1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
3 Copyright (C) 1999-2014 Free Software Foundation, Inc.
5 Written by Michael Snyder at Cygnus Solutions.
6 Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "elf-bfd.h" /* for elfcore_write_* */
29 #include "gdbthread.h"
31 #include "inf-child.h"
33 #if defined (NEW_PROC_API)
34 #define _STRUCTURED_PROC 1 /* Should be done by configure script. */
37 #include <sys/procfs.h>
38 #ifdef HAVE_SYS_FAULT_H
39 #include <sys/fault.h>
41 #ifdef HAVE_SYS_SYSCALL_H
42 #include <sys/syscall.h>
44 #include <sys/errno.h>
50 #include "gdb_assert.h"
56 /* This module provides the interface between GDB and the
57 /proc file system, which is used on many versions of Unix
58 as a means for debuggers to control other processes.
60 Examples of the systems that use this interface are:
67 /proc works by imitating a file system: you open a simulated file
68 that represents the process you wish to interact with, and perform
69 operations on that "file" in order to examine or change the state
72 The most important thing to know about /proc and this module is
73 that there are two very different interfaces to /proc:
75 One that uses the ioctl system call, and another that uses read
76 and write system calls.
78 This module has to support both /proc interfaces. This means that
79 there are two different ways of doing every basic operation.
81 In order to keep most of the code simple and clean, I have defined
82 an interface "layer" which hides all these system calls. An ifdef
83 (NEW_PROC_API) determines which interface we are using, and most or
84 all occurrances of this ifdef should be confined to this interface
87 /* Determine which /proc API we are using: The ioctl API defines
88 PIOCSTATUS, while the read/write (multiple fd) API never does. */
91 #include <sys/types.h>
92 #include <dirent.h> /* opendir/readdir, for listing the LWP's */
95 #include <fcntl.h> /* for O_RDONLY */
96 #include <unistd.h> /* for "X_OK" */
97 #include <sys/stat.h> /* for struct stat */
99 /* Note: procfs-utils.h must be included after the above system header
100 files, because it redefines various system calls using macros.
101 This may be incompatible with the prototype declarations. */
103 #include "proc-utils.h"
105 /* Prototypes for supply_gregset etc. */
108 /* =================== TARGET_OPS "MODULE" =================== */
110 /* This module defines the GDB target vector and its methods. */
112 static void procfs_attach (struct target_ops *, char *, int);
113 static void procfs_detach (struct target_ops *, const char *, int);
114 static void procfs_resume (struct target_ops *,
115 ptid_t, int, enum gdb_signal);
116 static void procfs_stop (ptid_t);
117 static void procfs_files_info (struct target_ops *);
118 static void procfs_fetch_registers (struct target_ops *,
119 struct regcache *, int);
120 static void procfs_store_registers (struct target_ops *,
121 struct regcache *, int);
122 static void procfs_pass_signals (int, unsigned char *);
123 static void procfs_kill_inferior (struct target_ops *ops);
124 static void procfs_mourn_inferior (struct target_ops *ops);
125 static void procfs_create_inferior (struct target_ops *, char *,
126 char *, char **, int);
127 static ptid_t procfs_wait (struct target_ops *,
128 ptid_t, struct target_waitstatus *, int);
129 static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int,
130 struct mem_attrib *attrib,
131 struct target_ops *);
132 static target_xfer_partial_ftype procfs_xfer_partial;
134 static int procfs_thread_alive (struct target_ops *ops, ptid_t);
136 static void procfs_find_new_threads (struct target_ops *ops);
137 static char *procfs_pid_to_str (struct target_ops *, ptid_t);
139 static int proc_find_memory_regions (find_memory_region_ftype, void *);
141 static char * procfs_make_note_section (bfd *, int *);
143 static int procfs_can_use_hw_breakpoint (int, int, int);
145 static void procfs_info_proc (struct target_ops *, char *,
146 enum info_proc_what);
148 #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64)
149 /* When GDB is built as 64-bit application on Solaris, the auxv data
150 is presented in 64-bit format. We need to provide a custom parser
153 procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
154 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
156 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
157 gdb_byte *ptr = *readptr;
162 if (endptr - ptr < 8 * 2)
165 *typep = extract_unsigned_integer (ptr, 4, byte_order);
167 /* The size of data is always 64-bit. If the application is 32-bit,
168 it will be zero extended, as expected. */
169 *valp = extract_unsigned_integer (ptr, 8, byte_order);
180 struct target_ops *t = inf_child_target ();
182 t->to_shortname = "procfs";
183 t->to_longname = "Unix /proc child process";
185 "Unix /proc child process (started by the \"run\" command).";
186 t->to_create_inferior = procfs_create_inferior;
187 t->to_kill = procfs_kill_inferior;
188 t->to_mourn_inferior = procfs_mourn_inferior;
189 t->to_attach = procfs_attach;
190 t->to_detach = procfs_detach;
191 t->to_wait = procfs_wait;
192 t->to_resume = procfs_resume;
193 t->to_fetch_registers = procfs_fetch_registers;
194 t->to_store_registers = procfs_store_registers;
195 t->to_xfer_partial = procfs_xfer_partial;
196 t->deprecated_xfer_memory = procfs_xfer_memory;
197 t->to_pass_signals = procfs_pass_signals;
198 t->to_files_info = procfs_files_info;
199 t->to_stop = procfs_stop;
201 t->to_find_new_threads = procfs_find_new_threads;
202 t->to_thread_alive = procfs_thread_alive;
203 t->to_pid_to_str = procfs_pid_to_str;
205 t->to_has_thread_control = tc_schedlock;
206 t->to_find_memory_regions = proc_find_memory_regions;
207 t->to_make_corefile_notes = procfs_make_note_section;
208 t->to_info_proc = procfs_info_proc;
210 #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64)
211 t->to_auxv_parse = procfs_auxv_parse;
214 t->to_magic = OPS_MAGIC;
219 /* =================== END, TARGET_OPS "MODULE" =================== */
221 /* World Unification:
223 Put any typedefs, defines etc. here that are required for the
224 unification of code that handles different versions of /proc. */
226 #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */
228 enum { READ_WATCHFLAG = WA_READ,
229 WRITE_WATCHFLAG = WA_WRITE,
230 EXEC_WATCHFLAG = WA_EXEC,
231 AFTER_WATCHFLAG = WA_TRAPAFTER
234 #else /* Irix method for watchpoints */
235 enum { READ_WATCHFLAG = MA_READ,
236 WRITE_WATCHFLAG = MA_WRITE,
237 EXEC_WATCHFLAG = MA_EXEC,
238 AFTER_WATCHFLAG = 0 /* trapafter not implemented */
243 #ifdef HAVE_PR_SIGSET_T
244 typedef pr_sigset_t gdb_sigset_t;
246 typedef sigset_t gdb_sigset_t;
250 #ifdef HAVE_PR_SIGACTION64_T
251 typedef pr_sigaction64_t gdb_sigaction_t;
253 typedef struct sigaction gdb_sigaction_t;
257 #ifdef HAVE_PR_SIGINFO64_T
258 typedef pr_siginfo64_t gdb_siginfo_t;
260 typedef siginfo_t gdb_siginfo_t;
263 /* On mips-irix, praddset and prdelset are defined in such a way that
264 they return a value, which causes GCC to emit a -Wunused error
265 because the returned value is not used. Prevent this warning
266 by casting the return value to void. On sparc-solaris, this issue
267 does not exist because the definition of these macros already include
268 that cast to void. */
269 #define gdb_praddset(sp, flag) ((void) praddset (sp, flag))
270 #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag))
272 /* gdb_premptysysset */
274 #define gdb_premptysysset premptysysset
276 #define gdb_premptysysset premptyset
281 #define gdb_praddsysset praddsysset
283 #define gdb_praddsysset gdb_praddset
288 #define gdb_prdelsysset prdelsysset
290 #define gdb_prdelsysset gdb_prdelset
293 /* prissyssetmember */
294 #ifdef prissyssetmember
295 #define gdb_pr_issyssetmember prissyssetmember
297 #define gdb_pr_issyssetmember prismember
300 /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't
301 as intuitively descriptive as it could be, so we'll define
302 DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of
303 this writing, this feature is only found on AIX5 systems and
304 basically means that the set of syscalls is not fixed. I.e,
305 there's no nice table that one can #include to get all of the
306 syscall numbers. Instead, they're stored in /proc/PID/sysent
307 for each process. We are at least guaranteed that they won't
308 change over the lifetime of the process. But each process could
309 (in theory) have different syscall numbers. */
310 #ifdef HAVE_PRSYSENT_T
311 #define DYNAMIC_SYSCALLS
316 /* =================== STRUCT PROCINFO "MODULE" =================== */
318 /* FIXME: this comment will soon be out of date W.R.T. threads. */
320 /* The procinfo struct is a wrapper to hold all the state information
321 concerning a /proc process. There should be exactly one procinfo
322 for each process, and since GDB currently can debug only one
323 process at a time, that means there should be only one procinfo.
324 All of the LWP's of a process can be accessed indirectly thru the
325 single process procinfo.
327 However, against the day when GDB may debug more than one process,
328 this data structure is kept in a list (which for now will hold no
329 more than one member), and many functions will have a pointer to a
330 procinfo as an argument.
332 There will be a separate procinfo structure for use by the (not yet
333 implemented) "info proc" command, so that we can print useful
334 information about any random process without interfering with the
335 inferior's procinfo information. */
338 /* format strings for /proc paths */
339 # ifndef CTL_PROC_NAME_FMT
340 # define MAIN_PROC_NAME_FMT "/proc/%d"
341 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
342 # define AS_PROC_NAME_FMT "/proc/%d/as"
343 # define MAP_PROC_NAME_FMT "/proc/%d/map"
344 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
345 # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus")
347 /* the name of the proc status struct depends on the implementation */
348 typedef pstatus_t gdb_prstatus_t;
349 typedef lwpstatus_t gdb_lwpstatus_t;
350 #else /* ! NEW_PROC_API */
351 /* format strings for /proc paths */
352 # ifndef CTL_PROC_NAME_FMT
353 # define MAIN_PROC_NAME_FMT "/proc/%05d"
354 # define CTL_PROC_NAME_FMT "/proc/%05d"
355 # define AS_PROC_NAME_FMT "/proc/%05d"
356 # define MAP_PROC_NAME_FMT "/proc/%05d"
357 # define STATUS_PROC_NAME_FMT "/proc/%05d"
358 # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp")
360 /* The name of the proc status struct depends on the implementation. */
361 typedef prstatus_t gdb_prstatus_t;
362 typedef prstatus_t gdb_lwpstatus_t;
363 #endif /* NEW_PROC_API */
365 typedef struct procinfo {
366 struct procinfo *next;
367 int pid; /* Process ID */
368 int tid; /* Thread/LWP id */
372 int ignore_next_sigstop;
374 /* The following four fd fields may be identical, or may contain
375 several different fd's, depending on the version of /proc
376 (old ioctl or new read/write). */
378 int ctl_fd; /* File descriptor for /proc control file */
380 /* The next three file descriptors are actually only needed in the
381 read/write, multiple-file-descriptor implemenation
382 (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the
383 code, we will use them uniformly by (in the case of the ioctl
384 single-file-descriptor implementation) filling them with copies
385 of the control fd. */
386 int status_fd; /* File descriptor for /proc status file */
387 int as_fd; /* File descriptor for /proc as file */
389 char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */
391 fltset_t saved_fltset; /* Saved traced hardware fault set */
392 gdb_sigset_t saved_sigset; /* Saved traced signal set */
393 gdb_sigset_t saved_sighold; /* Saved held signal set */
394 sysset_t *saved_exitset; /* Saved traced system call exit set */
395 sysset_t *saved_entryset; /* Saved traced system call entry set */
397 gdb_prstatus_t prstatus; /* Current process status info */
400 gdb_fpregset_t fpregset; /* Current floating point registers */
403 #ifdef DYNAMIC_SYSCALLS
404 int num_syscalls; /* Total number of syscalls */
405 char **syscall_names; /* Syscall number to name map */
408 struct procinfo *thread_list;
410 int status_valid : 1;
412 int fpregs_valid : 1;
413 int threads_valid: 1;
416 static char errmsg[128]; /* shared error msg buffer */
418 /* Function prototypes for procinfo module: */
420 static procinfo *find_procinfo_or_die (int pid, int tid);
421 static procinfo *find_procinfo (int pid, int tid);
422 static procinfo *create_procinfo (int pid, int tid);
423 static void destroy_procinfo (procinfo * p);
424 static void do_destroy_procinfo_cleanup (void *);
425 static void dead_procinfo (procinfo * p, char *msg, int killp);
426 static int open_procinfo_files (procinfo * p, int which);
427 static void close_procinfo_files (procinfo * p);
428 static int sysset_t_size (procinfo *p);
429 static sysset_t *sysset_t_alloc (procinfo * pi);
430 #ifdef DYNAMIC_SYSCALLS
431 static void load_syscalls (procinfo *pi);
432 static void free_syscalls (procinfo *pi);
433 static int find_syscall (procinfo *pi, char *name);
434 #endif /* DYNAMIC_SYSCALLS */
436 static int iterate_over_mappings
437 (procinfo *pi, find_memory_region_ftype child_func, void *data,
438 int (*func) (struct prmap *map, find_memory_region_ftype child_func,
441 /* The head of the procinfo list: */
442 static procinfo * procinfo_list;
444 /* Search the procinfo list. Return a pointer to procinfo, or NULL if
448 find_procinfo (int pid, int tid)
452 for (pi = procinfo_list; pi; pi = pi->next)
459 /* Don't check threads_valid. If we're updating the
460 thread_list, we want to find whatever threads are already
461 here. This means that in general it is the caller's
462 responsibility to check threads_valid and update before
463 calling find_procinfo, if the caller wants to find a new
466 for (pi = pi->thread_list; pi; pi = pi->next)
474 /* Calls find_procinfo, but errors on failure. */
477 find_procinfo_or_die (int pid, int tid)
479 procinfo *pi = find_procinfo (pid, tid);
484 error (_("procfs: couldn't find pid %d "
485 "(kernel thread %d) in procinfo list."),
488 error (_("procfs: couldn't find pid %d in procinfo list."), pid);
493 /* Wrapper for `open'. The appropriate open call is attempted; if
494 unsuccessful, it will be retried as many times as needed for the
495 EAGAIN and EINTR conditions.
497 For other conditions, retry the open a limited number of times. In
498 addition, a short sleep is imposed prior to retrying the open. The
499 reason for this sleep is to give the kernel a chance to catch up
500 and create the file in question in the event that GDB "wins" the
501 race to open a file before the kernel has created it. */
504 open_with_retry (const char *pathname, int flags)
506 int retries_remaining, status;
508 retries_remaining = 2;
512 status = open (pathname, flags);
514 if (status >= 0 || retries_remaining == 0)
516 else if (errno != EINTR && errno != EAGAIN)
526 /* Open the file descriptor for the process or LWP. If NEW_PROC_API
527 is defined, we only open the control file descriptor; the others
528 are opened lazily as needed. Otherwise (if not NEW_PROC_API),
529 there is only one real file descriptor, but we keep multiple copies
530 of it so that the code that uses them does not have to be #ifdef'd.
531 Returns the file descriptor, or zero for failure. */
533 enum { FD_CTL, FD_STATUS, FD_AS };
536 open_procinfo_files (procinfo *pi, int which)
539 char tmp[MAX_PROC_NAME_SIZE];
543 /* This function is getting ALMOST long enough to break up into
544 several. Here is some rationale:
546 NEW_PROC_API (Solaris 2.6, Solaris 2.7):
547 There are several file descriptors that may need to be open
548 for any given process or LWP. The ones we're intereted in are:
549 - control (ctl) write-only change the state
550 - status (status) read-only query the state
551 - address space (as) read/write access memory
552 - map (map) read-only virtual addr map
553 Most of these are opened lazily as they are needed.
554 The pathnames for the 'files' for an LWP look slightly
555 different from those of a first-class process:
556 Pathnames for a process (<proc-id>):
558 /proc/<proc-id>/status
561 Pathnames for an LWP (lwp-id):
562 /proc/<proc-id>/lwp/<lwp-id>/lwpctl
563 /proc/<proc-id>/lwp/<lwp-id>/lwpstatus
564 An LWP has no map or address space file descriptor, since
565 the memory map and address space are shared by all LWPs.
567 Everyone else (Solaris 2.5, Irix, OSF)
568 There is only one file descriptor for each process or LWP.
569 For convenience, we copy the same file descriptor into all
570 three fields of the procinfo struct (ctl_fd, status_fd, and
571 as_fd, see NEW_PROC_API above) so that code that uses them
572 doesn't need any #ifdef's.
577 Each LWP has an independent file descriptor, but these
578 are not obtained via the 'open' system call like the rest:
579 instead, they're obtained thru an ioctl call (PIOCOPENLWP)
580 to the file descriptor of the parent process.
583 These do not even have their own independent file descriptor.
584 All operations are carried out on the file descriptor of the
585 parent process. Therefore we just call open again for each
586 thread, getting a new handle for the same 'file'. */
589 /* In this case, there are several different file descriptors that
590 we might be asked to open. The control file descriptor will be
591 opened early, but the others will be opened lazily as they are
594 strcpy (tmp, pi->pathname);
595 switch (which) { /* Which file descriptor to open? */
598 strcat (tmp, "/lwpctl");
600 strcat (tmp, "/ctl");
601 fd = open_with_retry (tmp, O_WRONLY);
608 return 0; /* There is no 'as' file descriptor for an lwp. */
610 fd = open_with_retry (tmp, O_RDWR);
617 strcat (tmp, "/lwpstatus");
619 strcat (tmp, "/status");
620 fd = open_with_retry (tmp, O_RDONLY);
626 return 0; /* unknown file descriptor */
628 #else /* not NEW_PROC_API */
629 /* In this case, there is only one file descriptor for each procinfo
630 (ie. each process or LWP). In fact, only the file descriptor for
631 the process can actually be opened by an 'open' system call. The
632 ones for the LWPs have to be obtained thru an IOCTL call on the
633 process's file descriptor.
635 For convenience, we copy each procinfo's single file descriptor
636 into all of the fields occupied by the several file descriptors
637 of the NEW_PROC_API implementation. That way, the code that uses
638 them can be written without ifdefs. */
641 #ifdef PIOCTSTATUS /* OSF */
642 /* Only one FD; just open it. */
643 if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0)
645 #else /* Sol 2.5, Irix, other? */
646 if (pi->tid == 0) /* Master procinfo for the process */
648 fd = open_with_retry (pi->pathname, O_RDWR);
652 else /* LWP thread procinfo */
654 #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */
658 /* Find the procinfo for the entire process. */
659 if ((process = find_procinfo (pi->pid, 0)) == NULL)
662 /* Now obtain the file descriptor for the LWP. */
663 if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0)
665 #else /* Irix, other? */
666 return 0; /* Don't know how to open threads. */
667 #endif /* Sol 2.5 PIOCOPENLWP */
669 #endif /* OSF PIOCTSTATUS */
670 pi->ctl_fd = pi->as_fd = pi->status_fd = fd;
671 #endif /* NEW_PROC_API */
673 return 1; /* success */
676 /* Allocate a data structure and link it into the procinfo list.
677 First tries to find a pre-existing one (FIXME: why?). Returns the
678 pointer to new procinfo struct. */
681 create_procinfo (int pid, int tid)
683 procinfo *pi, *parent = NULL;
685 if ((pi = find_procinfo (pid, tid)))
686 return pi; /* Already exists, nothing to do. */
688 /* Find parent before doing malloc, to save having to cleanup. */
690 parent = find_procinfo_or_die (pid, 0); /* FIXME: should I
692 doesn't exist yet? */
694 pi = (procinfo *) xmalloc (sizeof (procinfo));
695 memset (pi, 0, sizeof (procinfo));
699 #ifdef DYNAMIC_SYSCALLS
703 pi->saved_entryset = sysset_t_alloc (pi);
704 pi->saved_exitset = sysset_t_alloc (pi);
706 /* Chain into list. */
709 sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
710 pi->next = procinfo_list;
716 sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid);
718 sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
720 pi->next = parent->thread_list;
721 parent->thread_list = pi;
726 /* Close all file descriptors associated with the procinfo. */
729 close_procinfo_files (procinfo *pi)
736 if (pi->status_fd > 0)
737 close (pi->status_fd);
739 pi->ctl_fd = pi->as_fd = pi->status_fd = 0;
742 /* Destructor function. Close, unlink and deallocate the object. */
745 destroy_one_procinfo (procinfo **list, procinfo *pi)
749 /* Step one: unlink the procinfo from its list. */
753 for (ptr = *list; ptr; ptr = ptr->next)
756 ptr->next = pi->next;
760 /* Step two: close any open file descriptors. */
761 close_procinfo_files (pi);
763 /* Step three: free the memory. */
764 #ifdef DYNAMIC_SYSCALLS
767 xfree (pi->saved_entryset);
768 xfree (pi->saved_exitset);
773 destroy_procinfo (procinfo *pi)
777 if (pi->tid != 0) /* Destroy a thread procinfo. */
779 tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */
780 destroy_one_procinfo (&tmp->thread_list, pi);
782 else /* Destroy a process procinfo and all its threads. */
784 /* First destroy the children, if any; */
785 while (pi->thread_list != NULL)
786 destroy_one_procinfo (&pi->thread_list, pi->thread_list);
787 /* Then destroy the parent. Genocide!!! */
788 destroy_one_procinfo (&procinfo_list, pi);
793 do_destroy_procinfo_cleanup (void *pi)
795 destroy_procinfo (pi);
798 enum { NOKILL, KILL };
800 /* To be called on a non_recoverable error for a procinfo. Prints
801 error messages, optionally sends a SIGKILL to the process, then
802 destroys the data structure. */
805 dead_procinfo (procinfo *pi, char *msg, int kill_p)
811 print_sys_errmsg (pi->pathname, errno);
815 sprintf (procfile, "process %d", pi->pid);
816 print_sys_errmsg (procfile, errno);
819 kill (pi->pid, SIGKILL);
821 destroy_procinfo (pi);
825 /* Returns the (complete) size of a sysset_t struct. Normally, this
826 is just sizeof (sysset_t), but in the case of Monterey/64, the
827 actual size of sysset_t isn't known until runtime. */
830 sysset_t_size (procinfo * pi)
832 #ifndef DYNAMIC_SYSCALLS
833 return sizeof (sysset_t);
835 return sizeof (sysset_t) - sizeof (uint64_t)
836 + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
837 / (8 * sizeof (uint64_t)));
841 /* Allocate and (partially) initialize a sysset_t struct. */
844 sysset_t_alloc (procinfo * pi)
847 int size = sysset_t_size (pi);
849 ret = xmalloc (size);
850 #ifdef DYNAMIC_SYSCALLS
851 ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
852 / (8 * sizeof (uint64_t)));
857 #ifdef DYNAMIC_SYSCALLS
859 /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize
860 pi->num_syscalls with the number of syscalls and pi->syscall_names
861 with the names. (Certain numbers may be skipped in which case the
862 names for these numbers will be left as NULL.) */
864 #define MAX_SYSCALL_NAME_LENGTH 256
865 #define MAX_SYSCALLS 65536
868 load_syscalls (procinfo *pi)
870 char pathname[MAX_PROC_NAME_SIZE];
873 prsyscall_t *syscalls;
874 int i, size, maxcall;
875 struct cleanup *cleanups;
877 pi->num_syscalls = 0;
878 pi->syscall_names = 0;
880 /* Open the file descriptor for the sysent file. */
881 sprintf (pathname, "/proc/%d/sysent", pi->pid);
882 sysent_fd = open_with_retry (pathname, O_RDONLY);
885 error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid);
887 cleanups = make_cleanup_close (sysent_fd);
889 size = sizeof header - sizeof (prsyscall_t);
890 if (read (sysent_fd, &header, size) != size)
892 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
895 if (header.pr_nsyscalls == 0)
897 error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"),
901 size = header.pr_nsyscalls * sizeof (prsyscall_t);
902 syscalls = xmalloc (size);
903 make_cleanup (free_current_contents, &syscalls);
905 if (read (sysent_fd, syscalls, size) != size)
906 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
908 /* Find maximum syscall number. This may not be the same as
909 pr_nsyscalls since that value refers to the number of entries
910 in the table. (Also, the docs indicate that some system
911 call numbers may be skipped.) */
913 maxcall = syscalls[0].pr_number;
915 for (i = 1; i < header.pr_nsyscalls; i++)
916 if (syscalls[i].pr_number > maxcall
917 && syscalls[i].pr_nameoff > 0
918 && syscalls[i].pr_number < MAX_SYSCALLS)
919 maxcall = syscalls[i].pr_number;
921 pi->num_syscalls = maxcall+1;
922 pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *));
924 for (i = 0; i < pi->num_syscalls; i++)
925 pi->syscall_names[i] = NULL;
927 /* Read the syscall names in. */
928 for (i = 0; i < header.pr_nsyscalls; i++)
930 char namebuf[MAX_SYSCALL_NAME_LENGTH];
934 if (syscalls[i].pr_number >= MAX_SYSCALLS
935 || syscalls[i].pr_number < 0
936 || syscalls[i].pr_nameoff <= 0
937 || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET)
938 != (off_t) syscalls[i].pr_nameoff))
941 nread = read (sysent_fd, namebuf, sizeof namebuf);
945 callnum = syscalls[i].pr_number;
947 if (pi->syscall_names[callnum] != NULL)
949 /* FIXME: Generate warning. */
953 namebuf[nread-1] = '\0';
954 size = strlen (namebuf) + 1;
955 pi->syscall_names[callnum] = xmalloc (size);
956 strncpy (pi->syscall_names[callnum], namebuf, size-1);
957 pi->syscall_names[callnum][size-1] = '\0';
960 do_cleanups (cleanups);
963 /* Free the space allocated for the syscall names from the procinfo
967 free_syscalls (procinfo *pi)
969 if (pi->syscall_names)
973 for (i = 0; i < pi->num_syscalls; i++)
974 if (pi->syscall_names[i] != NULL)
975 xfree (pi->syscall_names[i]);
977 xfree (pi->syscall_names);
978 pi->syscall_names = 0;
982 /* Given a name, look up (and return) the corresponding syscall number.
983 If no match is found, return -1. */
986 find_syscall (procinfo *pi, char *name)
990 for (i = 0; i < pi->num_syscalls; i++)
992 if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0)
999 /* =================== END, STRUCT PROCINFO "MODULE" =================== */
1001 /* =================== /proc "MODULE" =================== */
1003 /* This "module" is the interface layer between the /proc system API
1004 and the gdb target vector functions. This layer consists of access
1005 functions that encapsulate each of the basic operations that we
1006 need to use from the /proc API.
1008 The main motivation for this layer is to hide the fact that there
1009 are two very different implementations of the /proc API. Rather
1010 than have a bunch of #ifdefs all thru the gdb target vector
1011 functions, we do our best to hide them all in here. */
1013 static long proc_flags (procinfo * pi);
1014 static int proc_why (procinfo * pi);
1015 static int proc_what (procinfo * pi);
1016 static int proc_set_current_signal (procinfo * pi, int signo);
1017 static int proc_get_current_thread (procinfo * pi);
1018 static int proc_iterate_over_threads
1020 int (*func) (procinfo *, procinfo *, void *),
1024 proc_warn (procinfo *pi, char *func, int line)
1026 sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
1027 print_sys_errmsg (errmsg, errno);
1031 proc_error (procinfo *pi, char *func, int line)
1033 sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
1034 perror_with_name (errmsg);
1037 /* Updates the status struct in the procinfo. There is a 'valid'
1038 flag, to let other functions know when this function needs to be
1039 called (so the status is only read when it is needed). The status
1040 file descriptor is also only opened when it is needed. Returns
1041 non-zero for success, zero for failure. */
1044 proc_get_status (procinfo *pi)
1046 /* Status file descriptor is opened "lazily". */
1047 if (pi->status_fd == 0 &&
1048 open_procinfo_files (pi, FD_STATUS) == 0)
1050 pi->status_valid = 0;
1055 if (lseek (pi->status_fd, 0, SEEK_SET) < 0)
1056 pi->status_valid = 0; /* fail */
1059 /* Sigh... I have to read a different data structure,
1060 depending on whether this is a main process or an LWP. */
1062 pi->status_valid = (read (pi->status_fd,
1063 (char *) &pi->prstatus.pr_lwp,
1064 sizeof (lwpstatus_t))
1065 == sizeof (lwpstatus_t));
1068 pi->status_valid = (read (pi->status_fd,
1069 (char *) &pi->prstatus,
1070 sizeof (gdb_prstatus_t))
1071 == sizeof (gdb_prstatus_t));
1074 #else /* ioctl method */
1075 #ifdef PIOCTSTATUS /* osf */
1076 if (pi->tid == 0) /* main process */
1078 /* Just read the danged status. Now isn't that simple? */
1080 (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
1087 tid_t pr_error_thread;
1088 struct prstatus status;
1091 thread_status.pr_count = 1;
1092 thread_status.status.pr_tid = pi->tid;
1093 win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0);
1096 memcpy (&pi->prstatus, &thread_status.status,
1097 sizeof (pi->prstatus));
1098 pi->status_valid = 1;
1102 /* Just read the danged status. Now isn't that simple? */
1103 pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
1107 if (pi->status_valid)
1109 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1112 proc_get_current_thread (pi));
1115 /* The status struct includes general regs, so mark them valid too. */
1116 pi->gregs_valid = pi->status_valid;
1118 /* In the read/write multiple-fd model, the status struct includes
1119 the fp regs too, so mark them valid too. */
1120 pi->fpregs_valid = pi->status_valid;
1122 return pi->status_valid; /* True if success, false if failure. */
1125 /* Returns the process flags (pr_flags field). */
1128 proc_flags (procinfo *pi)
1130 if (!pi->status_valid)
1131 if (!proc_get_status (pi))
1132 return 0; /* FIXME: not a good failure value (but what is?) */
1135 return pi->prstatus.pr_lwp.pr_flags;
1137 return pi->prstatus.pr_flags;
1141 /* Returns the pr_why field (why the process stopped). */
1144 proc_why (procinfo *pi)
1146 if (!pi->status_valid)
1147 if (!proc_get_status (pi))
1148 return 0; /* FIXME: not a good failure value (but what is?) */
1151 return pi->prstatus.pr_lwp.pr_why;
1153 return pi->prstatus.pr_why;
1157 /* Returns the pr_what field (details of why the process stopped). */
1160 proc_what (procinfo *pi)
1162 if (!pi->status_valid)
1163 if (!proc_get_status (pi))
1164 return 0; /* FIXME: not a good failure value (but what is?) */
1167 return pi->prstatus.pr_lwp.pr_what;
1169 return pi->prstatus.pr_what;
1173 /* This function is only called when PI is stopped by a watchpoint.
1174 Assuming the OS supports it, write to *ADDR the data address which
1175 triggered it and return 1. Return 0 if it is not possible to know
1179 proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr)
1181 if (!pi->status_valid)
1182 if (!proc_get_status (pi))
1186 *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (),
1187 builtin_type (target_gdbarch ())->builtin_data_ptr,
1188 (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr);
1190 *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (),
1191 builtin_type (target_gdbarch ())->builtin_data_ptr,
1192 (gdb_byte *) &pi->prstatus.pr_info.si_addr);
1197 #ifndef PIOCSSPCACT /* The following is not supported on OSF. */
1199 /* Returns the pr_nsysarg field (number of args to the current
1203 proc_nsysarg (procinfo *pi)
1205 if (!pi->status_valid)
1206 if (!proc_get_status (pi))
1210 return pi->prstatus.pr_lwp.pr_nsysarg;
1212 return pi->prstatus.pr_nsysarg;
1216 /* Returns the pr_sysarg field (pointer to the arguments of current
1220 proc_sysargs (procinfo *pi)
1222 if (!pi->status_valid)
1223 if (!proc_get_status (pi))
1227 return (long *) &pi->prstatus.pr_lwp.pr_sysarg;
1229 return (long *) &pi->prstatus.pr_sysarg;
1232 #endif /* PIOCSSPCACT */
1234 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
1235 /* Returns the pr_cursig field (current signal). */
1238 proc_cursig (struct procinfo *pi)
1240 if (!pi->status_valid)
1241 if (!proc_get_status (pi))
1242 return 0; /* FIXME: not a good failure value (but what is?) */
1245 return pi->prstatus.pr_lwp.pr_cursig;
1247 return pi->prstatus.pr_cursig;
1250 #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */
1252 /* === I appologize for the messiness of this function.
1253 === This is an area where the different versions of
1254 === /proc are more inconsistent than usual.
1256 Set or reset any of the following process flags:
1257 PR_FORK -- forked child will inherit trace flags
1258 PR_RLC -- traced process runs when last /proc file closed.
1259 PR_KLC -- traced process is killed when last /proc file closed.
1260 PR_ASYNC -- LWP's get to run/stop independently.
1262 There are three methods for doing this function:
1263 1) Newest: read/write [PCSET/PCRESET/PCUNSET]
1265 2) Middle: PIOCSET/PIOCRESET
1267 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC
1270 Note: Irix does not define PR_ASYNC.
1271 Note: OSF does not define PR_KLC.
1272 Note: OSF is the only one that can ONLY use the oldest method.
1276 flag -- one of PR_FORK, PR_RLC, or PR_ASYNC
1277 mode -- 1 for set, 0 for reset.
1279 Returns non-zero for success, zero for failure. */
1281 enum { FLAG_RESET, FLAG_SET };
1284 proc_modify_flag (procinfo *pi, long flag, long mode)
1286 long win = 0; /* default to fail */
1288 /* These operations affect the process as a whole, and applying them
1289 to an individual LWP has the same meaning as applying them to the
1290 main process. Therefore, if we're ever called with a pointer to
1291 an LWP's procinfo, let's substitute the process's procinfo and
1292 avoid opening the LWP's file descriptor unnecessarily. */
1295 pi = find_procinfo_or_die (pi->pid, 0);
1297 #ifdef NEW_PROC_API /* Newest method: Newer Solarii. */
1298 /* First normalize the PCUNSET/PCRESET command opcode
1299 (which for no obvious reason has a different definition
1300 from one operating system to the next...) */
1302 #define GDBRESET PCUNSET
1305 #define GDBRESET PCRESET
1309 procfs_ctl_t arg[2];
1311 if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */
1313 else /* Reset the flag. */
1317 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
1320 #ifdef PIOCSET /* Irix/Sol5 method */
1321 if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */
1323 win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0);
1325 else /* Reset the flag. */
1327 win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0);
1331 #ifdef PIOCSRLC /* Oldest method: OSF */
1334 if (mode == FLAG_SET) /* Set run-on-last-close */
1336 win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0);
1338 else /* Clear run-on-last-close */
1340 win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0);
1344 if (mode == FLAG_SET) /* Set inherit-on-fork */
1346 win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0);
1348 else /* Clear inherit-on-fork */
1350 win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0);
1354 win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */
1361 /* The above operation renders the procinfo's cached pstatus
1363 pi->status_valid = 0;
1366 warning (_("procfs: modify_flag failed to turn %s %s"),
1367 flag == PR_FORK ? "PR_FORK" :
1368 flag == PR_RLC ? "PR_RLC" :
1370 flag == PR_ASYNC ? "PR_ASYNC" :
1373 flag == PR_KLC ? "PR_KLC" :
1376 mode == FLAG_RESET ? "off" : "on");
1381 /* Set the run_on_last_close flag. Process with all threads will
1382 become runnable when debugger closes all /proc fds. Returns
1383 non-zero for success, zero for failure. */
1386 proc_set_run_on_last_close (procinfo *pi)
1388 return proc_modify_flag (pi, PR_RLC, FLAG_SET);
1391 /* Reset the run_on_last_close flag. The process will NOT become
1392 runnable when debugger closes its file handles. Returns non-zero
1393 for success, zero for failure. */
1396 proc_unset_run_on_last_close (procinfo *pi)
1398 return proc_modify_flag (pi, PR_RLC, FLAG_RESET);
1401 /* Reset inherit_on_fork flag. If the process forks a child while we
1402 are registered for events in the parent, then we will NOT recieve
1403 events from the child. Returns non-zero for success, zero for
1407 proc_unset_inherit_on_fork (procinfo *pi)
1409 return proc_modify_flag (pi, PR_FORK, FLAG_RESET);
1413 /* Set PR_ASYNC flag. If one LWP stops because of a debug event
1414 (signal etc.), the remaining LWPs will continue to run. Returns
1415 non-zero for success, zero for failure. */
1418 proc_set_async (procinfo *pi)
1420 return proc_modify_flag (pi, PR_ASYNC, FLAG_SET);
1423 /* Reset PR_ASYNC flag. If one LWP stops because of a debug event
1424 (signal etc.), then all other LWPs will stop as well. Returns
1425 non-zero for success, zero for failure. */
1428 proc_unset_async (procinfo *pi)
1430 return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET);
1432 #endif /* PR_ASYNC */
1434 /* Request the process/LWP to stop. Does not wait. Returns non-zero
1435 for success, zero for failure. */
1438 proc_stop_process (procinfo *pi)
1442 /* We might conceivably apply this operation to an LWP, and the
1443 LWP's ctl file descriptor might not be open. */
1445 if (pi->ctl_fd == 0 &&
1446 open_procinfo_files (pi, FD_CTL) == 0)
1451 procfs_ctl_t cmd = PCSTOP;
1453 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1454 #else /* ioctl method */
1455 win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0);
1456 /* Note: the call also reads the prstatus. */
1459 pi->status_valid = 1;
1460 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1463 proc_get_current_thread (pi));
1471 /* Wait for the process or LWP to stop (block until it does). Returns
1472 non-zero for success, zero for failure. */
1475 proc_wait_for_stop (procinfo *pi)
1479 /* We should never have to apply this operation to any procinfo
1480 except the one for the main process. If that ever changes for
1481 any reason, then take out the following clause and replace it
1482 with one that makes sure the ctl_fd is open. */
1485 pi = find_procinfo_or_die (pi->pid, 0);
1489 procfs_ctl_t cmd = PCWSTOP;
1491 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1492 /* We been runnin' and we stopped -- need to update status. */
1493 pi->status_valid = 0;
1495 #else /* ioctl method */
1496 win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0);
1497 /* Above call also refreshes the prstatus. */
1500 pi->status_valid = 1;
1501 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1504 proc_get_current_thread (pi));
1511 /* Make the process or LWP runnable.
1513 Options (not all are implemented):
1515 - clear current fault
1516 - clear current signal
1517 - abort the current system call
1518 - stop as soon as finished with system call
1519 - (ioctl): set traced signal set
1520 - (ioctl): set held signal set
1521 - (ioctl): set traced fault set
1522 - (ioctl): set start pc (vaddr)
1524 Always clears the current fault. PI is the process or LWP to
1525 operate on. If STEP is true, set the process or LWP to trap after
1526 one instruction. If SIGNO is zero, clear the current signal if
1527 any; if non-zero, set the current signal to this one. Returns
1528 non-zero for success, zero for failure. */
1531 proc_run_process (procinfo *pi, int step, int signo)
1536 /* We will probably have to apply this operation to individual
1537 threads, so make sure the control file descriptor is open. */
1539 if (pi->ctl_fd == 0 &&
1540 open_procinfo_files (pi, FD_CTL) == 0)
1545 runflags = PRCFAULT; /* Always clear current fault. */
1550 else if (signo != -1) /* -1 means do nothing W.R.T. signals. */
1551 proc_set_current_signal (pi, signo);
1555 procfs_ctl_t cmd[2];
1559 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1561 #else /* ioctl method */
1565 memset (&prrun, 0, sizeof (prrun));
1566 prrun.pr_flags = runflags;
1567 win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0);
1574 /* Register to trace signals in the process or LWP. Returns non-zero
1575 for success, zero for failure. */
1578 proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset)
1582 /* We should never have to apply this operation to any procinfo
1583 except the one for the main process. If that ever changes for
1584 any reason, then take out the following clause and replace it
1585 with one that makes sure the ctl_fd is open. */
1588 pi = find_procinfo_or_die (pi->pid, 0);
1594 /* Use char array to avoid alignment issues. */
1595 char sigset[sizeof (gdb_sigset_t)];
1599 memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t));
1601 win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
1603 #else /* ioctl method */
1604 win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0);
1606 /* The above operation renders the procinfo's cached pstatus obsolete. */
1607 pi->status_valid = 0;
1610 warning (_("procfs: set_traced_signals failed"));
1614 /* Register to trace hardware faults in the process or LWP. Returns
1615 non-zero for success, zero for failure. */
1618 proc_set_traced_faults (procinfo *pi, fltset_t *fltset)
1622 /* We should never have to apply this operation to any procinfo
1623 except the one for the main process. If that ever changes for
1624 any reason, then take out the following clause and replace it
1625 with one that makes sure the ctl_fd is open. */
1628 pi = find_procinfo_or_die (pi->pid, 0);
1634 /* Use char array to avoid alignment issues. */
1635 char fltset[sizeof (fltset_t)];
1639 memcpy (&arg.fltset, fltset, sizeof (fltset_t));
1641 win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
1643 #else /* ioctl method */
1644 win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0);
1646 /* The above operation renders the procinfo's cached pstatus obsolete. */
1647 pi->status_valid = 0;
1652 /* Register to trace entry to system calls in the process or LWP.
1653 Returns non-zero for success, zero for failure. */
1656 proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset)
1660 /* We should never have to apply this operation to any procinfo
1661 except the one for the main process. If that ever changes for
1662 any reason, then take out the following clause and replace it
1663 with one that makes sure the ctl_fd is open. */
1666 pi = find_procinfo_or_die (pi->pid, 0);
1670 struct gdb_proc_ctl_pcsentry {
1672 /* Use char array to avoid alignment issues. */
1673 char sysset[sizeof (sysset_t)];
1675 int argp_size = sizeof (struct gdb_proc_ctl_pcsentry)
1677 + sysset_t_size (pi);
1679 argp = xmalloc (argp_size);
1681 argp->cmd = PCSENTRY;
1682 memcpy (&argp->sysset, sysset, sysset_t_size (pi));
1684 win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
1687 #else /* ioctl method */
1688 win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0);
1690 /* The above operation renders the procinfo's cached pstatus
1692 pi->status_valid = 0;
1697 /* Register to trace exit from system calls in the process or LWP.
1698 Returns non-zero for success, zero for failure. */
1701 proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset)
1705 /* We should never have to apply this operation to any procinfo
1706 except the one for the main process. If that ever changes for
1707 any reason, then take out the following clause and replace it
1708 with one that makes sure the ctl_fd is open. */
1711 pi = find_procinfo_or_die (pi->pid, 0);
1715 struct gdb_proc_ctl_pcsexit {
1717 /* Use char array to avoid alignment issues. */
1718 char sysset[sizeof (sysset_t)];
1720 int argp_size = sizeof (struct gdb_proc_ctl_pcsexit)
1722 + sysset_t_size (pi);
1724 argp = xmalloc (argp_size);
1726 argp->cmd = PCSEXIT;
1727 memcpy (&argp->sysset, sysset, sysset_t_size (pi));
1729 win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
1732 #else /* ioctl method */
1733 win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0);
1735 /* The above operation renders the procinfo's cached pstatus
1737 pi->status_valid = 0;
1742 /* Specify the set of blocked / held signals in the process or LWP.
1743 Returns non-zero for success, zero for failure. */
1746 proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold)
1750 /* We should never have to apply this operation to any procinfo
1751 except the one for the main process. If that ever changes for
1752 any reason, then take out the following clause and replace it
1753 with one that makes sure the ctl_fd is open. */
1756 pi = find_procinfo_or_die (pi->pid, 0);
1762 /* Use char array to avoid alignment issues. */
1763 char hold[sizeof (gdb_sigset_t)];
1767 memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t));
1768 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
1771 win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0);
1773 /* The above operation renders the procinfo's cached pstatus
1775 pi->status_valid = 0;
1780 /* Returns the set of signals that are held / blocked. Will also copy
1781 the sigset if SAVE is non-zero. */
1783 static gdb_sigset_t *
1784 proc_get_held_signals (procinfo *pi, gdb_sigset_t *save)
1786 gdb_sigset_t *ret = NULL;
1788 /* We should never have to apply this operation to any procinfo
1789 except the one for the main process. If that ever changes for
1790 any reason, then take out the following clause and replace it
1791 with one that makes sure the ctl_fd is open. */
1794 pi = find_procinfo_or_die (pi->pid, 0);
1797 if (!pi->status_valid)
1798 if (!proc_get_status (pi))
1801 ret = &pi->prstatus.pr_lwp.pr_lwphold;
1802 #else /* not NEW_PROC_API */
1804 static gdb_sigset_t sigheld;
1806 if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0)
1809 #endif /* NEW_PROC_API */
1811 memcpy (save, ret, sizeof (gdb_sigset_t));
1816 /* Returns the set of signals that are traced / debugged. Will also
1817 copy the sigset if SAVE is non-zero. */
1819 static gdb_sigset_t *
1820 proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save)
1822 gdb_sigset_t *ret = NULL;
1824 /* We should never have to apply this operation to any procinfo
1825 except the one for the main process. If that ever changes for
1826 any reason, then take out the following clause and replace it
1827 with one that makes sure the ctl_fd is open. */
1830 pi = find_procinfo_or_die (pi->pid, 0);
1833 if (!pi->status_valid)
1834 if (!proc_get_status (pi))
1837 ret = &pi->prstatus.pr_sigtrace;
1840 static gdb_sigset_t sigtrace;
1842 if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0)
1847 memcpy (save, ret, sizeof (gdb_sigset_t));
1852 /* Returns the set of hardware faults that are traced /debugged. Will
1853 also copy the faultset if SAVE is non-zero. */
1856 proc_get_traced_faults (procinfo *pi, fltset_t *save)
1858 fltset_t *ret = NULL;
1860 /* We should never have to apply this operation to any procinfo
1861 except the one for the main process. If that ever changes for
1862 any reason, then take out the following clause and replace it
1863 with one that makes sure the ctl_fd is open. */
1866 pi = find_procinfo_or_die (pi->pid, 0);
1869 if (!pi->status_valid)
1870 if (!proc_get_status (pi))
1873 ret = &pi->prstatus.pr_flttrace;
1876 static fltset_t flttrace;
1878 if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0)
1883 memcpy (save, ret, sizeof (fltset_t));
1888 /* Returns the set of syscalls that are traced /debugged on entry.
1889 Will also copy the syscall set if SAVE is non-zero. */
1892 proc_get_traced_sysentry (procinfo *pi, sysset_t *save)
1894 sysset_t *ret = NULL;
1896 /* We should never have to apply this operation to any procinfo
1897 except the one for the main process. If that ever changes for
1898 any reason, then take out the following clause and replace it
1899 with one that makes sure the ctl_fd is open. */
1902 pi = find_procinfo_or_die (pi->pid, 0);
1905 if (!pi->status_valid)
1906 if (!proc_get_status (pi))
1909 #ifndef DYNAMIC_SYSCALLS
1910 ret = &pi->prstatus.pr_sysentry;
1911 #else /* DYNAMIC_SYSCALLS */
1913 static sysset_t *sysentry;
1917 sysentry = sysset_t_alloc (pi);
1919 if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
1921 if (pi->prstatus.pr_sysentry_offset == 0)
1923 gdb_premptysysset (sysentry);
1929 if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset,
1931 != (off_t) pi->prstatus.pr_sysentry_offset)
1933 size = sysset_t_size (pi);
1934 gdb_premptysysset (sysentry);
1935 rsize = read (pi->status_fd, sysentry, size);
1940 #endif /* DYNAMIC_SYSCALLS */
1941 #else /* !NEW_PROC_API */
1943 static sysset_t sysentry;
1945 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0)
1948 #endif /* NEW_PROC_API */
1950 memcpy (save, ret, sysset_t_size (pi));
1955 /* Returns the set of syscalls that are traced /debugged on exit.
1956 Will also copy the syscall set if SAVE is non-zero. */
1959 proc_get_traced_sysexit (procinfo *pi, sysset_t *save)
1961 sysset_t * ret = NULL;
1963 /* We should never have to apply this operation to any procinfo
1964 except the one for the main process. If that ever changes for
1965 any reason, then take out the following clause and replace it
1966 with one that makes sure the ctl_fd is open. */
1969 pi = find_procinfo_or_die (pi->pid, 0);
1972 if (!pi->status_valid)
1973 if (!proc_get_status (pi))
1976 #ifndef DYNAMIC_SYSCALLS
1977 ret = &pi->prstatus.pr_sysexit;
1978 #else /* DYNAMIC_SYSCALLS */
1980 static sysset_t *sysexit;
1984 sysexit = sysset_t_alloc (pi);
1986 if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
1988 if (pi->prstatus.pr_sysexit_offset == 0)
1990 gdb_premptysysset (sysexit);
1996 if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset,
1998 != (off_t) pi->prstatus.pr_sysexit_offset)
2000 size = sysset_t_size (pi);
2001 gdb_premptysysset (sysexit);
2002 rsize = read (pi->status_fd, sysexit, size);
2007 #endif /* DYNAMIC_SYSCALLS */
2010 static sysset_t sysexit;
2012 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0)
2017 memcpy (save, ret, sysset_t_size (pi));
2022 /* The current fault (if any) is cleared; the associated signal will
2023 not be sent to the process or LWP when it resumes. Returns
2024 non-zero for success, zero for failure. */
2027 proc_clear_current_fault (procinfo *pi)
2031 /* We should never have to apply this operation to any procinfo
2032 except the one for the main process. If that ever changes for
2033 any reason, then take out the following clause and replace it
2034 with one that makes sure the ctl_fd is open. */
2037 pi = find_procinfo_or_die (pi->pid, 0);
2041 procfs_ctl_t cmd = PCCFAULT;
2043 win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd));
2046 win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0);
2052 /* Set the "current signal" that will be delivered next to the
2053 process. NOTE: semantics are different from those of KILL. This
2054 signal will be delivered to the process or LWP immediately when it
2055 is resumed (even if the signal is held/blocked); it will NOT
2056 immediately cause another event of interest, and will NOT first
2057 trap back to the debugger. Returns non-zero for success, zero for
2061 proc_set_current_signal (procinfo *pi, int signo)
2066 /* Use char array to avoid alignment issues. */
2067 char sinfo[sizeof (gdb_siginfo_t)];
2069 gdb_siginfo_t mysinfo;
2071 struct target_waitstatus wait_status;
2073 /* We should never have to apply this operation to any procinfo
2074 except the one for the main process. If that ever changes for
2075 any reason, then take out the following clause and replace it
2076 with one that makes sure the ctl_fd is open. */
2079 pi = find_procinfo_or_die (pi->pid, 0);
2081 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
2082 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
2083 receives a PIOCSSIG with a signal identical to the current
2084 signal, it messes up the current signal. Work around the kernel
2087 signo == proc_cursig (pi))
2088 return 1; /* I assume this is a success? */
2091 /* The pointer is just a type alias. */
2092 get_last_target_status (&wait_ptid, &wait_status);
2093 if (ptid_equal (wait_ptid, inferior_ptid)
2094 && wait_status.kind == TARGET_WAITKIND_STOPPED
2095 && wait_status.value.sig == gdb_signal_from_host (signo)
2096 && proc_get_status (pi)
2098 && pi->prstatus.pr_lwp.pr_info.si_signo == signo
2100 && pi->prstatus.pr_info.si_signo == signo
2103 /* Use the siginfo associated with the signal being
2106 memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t));
2108 memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t));
2112 mysinfo.si_signo = signo;
2113 mysinfo.si_code = 0;
2114 mysinfo.si_pid = getpid (); /* ?why? */
2115 mysinfo.si_uid = getuid (); /* ?why? */
2116 memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t));
2121 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2123 win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0);
2129 /* The current signal (if any) is cleared, and is not sent to the
2130 process or LWP when it resumes. Returns non-zero for success, zero
2134 proc_clear_current_signal (procinfo *pi)
2138 /* We should never have to apply this operation to any procinfo
2139 except the one for the main process. If that ever changes for
2140 any reason, then take out the following clause and replace it
2141 with one that makes sure the ctl_fd is open. */
2144 pi = find_procinfo_or_die (pi->pid, 0);
2150 /* Use char array to avoid alignment issues. */
2151 char sinfo[sizeof (gdb_siginfo_t)];
2153 gdb_siginfo_t mysinfo;
2156 /* The pointer is just a type alias. */
2157 mysinfo.si_signo = 0;
2158 mysinfo.si_code = 0;
2159 mysinfo.si_errno = 0;
2160 mysinfo.si_pid = getpid (); /* ?why? */
2161 mysinfo.si_uid = getuid (); /* ?why? */
2162 memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t));
2164 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2167 win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0);
2173 /* Return the general-purpose registers for the process or LWP
2174 corresponding to PI. Upon failure, return NULL. */
2176 static gdb_gregset_t *
2177 proc_get_gregs (procinfo *pi)
2179 if (!pi->status_valid || !pi->gregs_valid)
2180 if (!proc_get_status (pi))
2184 return &pi->prstatus.pr_lwp.pr_reg;
2186 return &pi->prstatus.pr_reg;
2190 /* Return the general-purpose registers for the process or LWP
2191 corresponding to PI. Upon failure, return NULL. */
2193 static gdb_fpregset_t *
2194 proc_get_fpregs (procinfo *pi)
2197 if (!pi->status_valid || !pi->fpregs_valid)
2198 if (!proc_get_status (pi))
2201 return &pi->prstatus.pr_lwp.pr_fpreg;
2203 #else /* not NEW_PROC_API */
2204 if (pi->fpregs_valid)
2205 return &pi->fpregset; /* Already got 'em. */
2208 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2217 tid_t pr_error_thread;
2218 tfpregset_t thread_1;
2221 thread_fpregs.pr_count = 1;
2222 thread_fpregs.thread_1.tid = pi->tid;
2225 && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
2227 pi->fpregs_valid = 1;
2228 return &pi->fpregset; /* Got 'em now! */
2230 else if (pi->tid != 0
2231 && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0)
2233 memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs,
2234 sizeof (pi->fpregset));
2235 pi->fpregs_valid = 1;
2236 return &pi->fpregset; /* Got 'em now! */
2243 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
2245 pi->fpregs_valid = 1;
2246 return &pi->fpregset; /* Got 'em now! */
2255 #endif /* NEW_PROC_API */
2258 /* Write the general-purpose registers back to the process or LWP
2259 corresponding to PI. Return non-zero for success, zero for
2263 proc_set_gregs (procinfo *pi)
2265 gdb_gregset_t *gregs;
2268 gregs = proc_get_gregs (pi);
2270 return 0; /* proc_get_regs has already warned. */
2272 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2281 /* Use char array to avoid alignment issues. */
2282 char gregs[sizeof (gdb_gregset_t)];
2286 memcpy (&arg.gregs, gregs, sizeof (arg.gregs));
2287 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2289 win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0);
2293 /* Policy: writing the registers invalidates our cache. */
2294 pi->gregs_valid = 0;
2298 /* Write the floating-pointer registers back to the process or LWP
2299 corresponding to PI. Return non-zero for success, zero for
2303 proc_set_fpregs (procinfo *pi)
2305 gdb_fpregset_t *fpregs;
2308 fpregs = proc_get_fpregs (pi);
2310 return 0; /* proc_get_fpregs has already warned. */
2312 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2321 /* Use char array to avoid alignment issues. */
2322 char fpregs[sizeof (gdb_fpregset_t)];
2326 memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs));
2327 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2331 win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
2336 tid_t pr_error_thread;
2337 tfpregset_t thread_1;
2340 thread_fpregs.pr_count = 1;
2341 thread_fpregs.thread_1.tid = pi->tid;
2342 memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs,
2344 win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0);
2347 win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
2349 #endif /* NEW_PROC_API */
2352 /* Policy: writing the registers invalidates our cache. */
2353 pi->fpregs_valid = 0;
2357 /* Send a signal to the proc or lwp with the semantics of "kill()".
2358 Returns non-zero for success, zero for failure. */
2361 proc_kill (procinfo *pi, int signo)
2365 /* We might conceivably apply this operation to an LWP, and the
2366 LWP's ctl file descriptor might not be open. */
2368 if (pi->ctl_fd == 0 &&
2369 open_procinfo_files (pi, FD_CTL) == 0)
2376 procfs_ctl_t cmd[2];
2380 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
2381 #else /* ioctl method */
2382 /* FIXME: do I need the Alpha OSF fixups present in
2383 procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */
2384 win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0);
2391 /* Find the pid of the process that started this one. Returns the
2392 parent process pid, or zero. */
2395 proc_parent_pid (procinfo *pi)
2397 /* We should never have to apply this operation to any procinfo
2398 except the one for the main process. If that ever changes for
2399 any reason, then take out the following clause and replace it
2400 with one that makes sure the ctl_fd is open. */
2403 pi = find_procinfo_or_die (pi->pid, 0);
2405 if (!pi->status_valid)
2406 if (!proc_get_status (pi))
2409 return pi->prstatus.pr_ppid;
2412 /* Convert a target address (a.k.a. CORE_ADDR) into a host address
2413 (a.k.a void pointer)! */
2415 #if (defined (PCWATCH) || defined (PIOCSWATCH)) \
2416 && !(defined (PIOCOPENLWP))
2418 procfs_address_to_host_pointer (CORE_ADDR addr)
2420 struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
2423 gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type));
2424 gdbarch_address_to_pointer (target_gdbarch (), ptr_type,
2425 (gdb_byte *) &ptr, addr);
2431 proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags)
2433 #if !defined (PCWATCH) && !defined (PIOCSWATCH)
2434 /* If neither or these is defined, we can't support watchpoints.
2435 This just avoids possibly failing to compile the below on such
2439 /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */
2440 #if defined (PIOCOPENLWP) /* Solaris 2.5: bail out. */
2445 char watch[sizeof (prwatch_t)];
2449 /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to
2450 convert a target address into something that can be stored in a
2451 native data structure. */
2452 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
2453 pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr);
2455 pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr);
2457 pwatch.pr_size = len;
2458 pwatch.pr_wflags = wflags;
2459 #if defined(NEW_PROC_API) && defined (PCWATCH)
2461 memcpy (arg.watch, &pwatch, sizeof (prwatch_t));
2462 return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg));
2464 #if defined (PIOCSWATCH)
2465 return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0);
2467 return 0; /* Fail */
2474 #if (defined(__i386__) || defined(__x86_64__)) && defined (sun)
2476 #include <sys/sysi86.h>
2478 /* The KEY is actually the value of the lower 16 bits of the GS
2479 register for the LWP that we're interested in. Returns the
2480 matching ssh struct (LDT entry). */
2483 proc_get_LDT_entry (procinfo *pi, int key)
2485 static struct ssd *ldt_entry = NULL;
2487 char pathname[MAX_PROC_NAME_SIZE];
2488 struct cleanup *old_chain = NULL;
2491 /* Allocate space for one LDT entry.
2492 This alloc must persist, because we return a pointer to it. */
2493 if (ldt_entry == NULL)
2494 ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd));
2496 /* Open the file descriptor for the LDT table. */
2497 sprintf (pathname, "/proc/%d/ldt", pi->pid);
2498 if ((fd = open_with_retry (pathname, O_RDONLY)) < 0)
2500 proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__);
2503 /* Make sure it gets closed again! */
2504 old_chain = make_cleanup_close (fd);
2506 /* Now 'read' thru the table, find a match and return it. */
2507 while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd))
2509 if (ldt_entry->sel == 0 &&
2510 ldt_entry->bo == 0 &&
2511 ldt_entry->acc1 == 0 &&
2512 ldt_entry->acc2 == 0)
2513 break; /* end of table */
2514 /* If key matches, return this entry. */
2515 if (ldt_entry->sel == key)
2518 /* Loop ended, match not found. */
2522 static int nalloc = 0;
2524 /* Get the number of LDT entries. */
2525 if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0)
2527 proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__);
2531 /* Allocate space for the number of LDT entries. */
2532 /* This alloc has to persist, 'cause we return a pointer to it. */
2535 ldt_entry = (struct ssd *)
2536 xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd));
2540 /* Read the whole table in one gulp. */
2541 if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0)
2543 proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__);
2547 /* Search the table and return the (first) entry matching 'key'. */
2548 for (i = 0; i < nldt; i++)
2549 if (ldt_entry[i].sel == key)
2550 return &ldt_entry[i];
2552 /* Loop ended, match not found. */
2557 /* Returns the pointer to the LDT entry of PTID. */
2560 procfs_find_LDT_entry (ptid_t ptid)
2562 gdb_gregset_t *gregs;
2566 /* Find procinfo for the lwp. */
2567 if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL)
2569 warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."),
2570 ptid_get_pid (ptid), ptid_get_lwp (ptid));
2573 /* get its general registers. */
2574 if ((gregs = proc_get_gregs (pi)) == NULL)
2576 warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."),
2577 ptid_get_pid (ptid), ptid_get_lwp (ptid));
2580 /* Now extract the GS register's lower 16 bits. */
2581 key = (*gregs)[GS] & 0xffff;
2583 /* Find the matching entry and return it. */
2584 return proc_get_LDT_entry (pi, key);
2589 /* =============== END, non-thread part of /proc "MODULE" =============== */
2591 /* =================== Thread "MODULE" =================== */
2593 /* NOTE: you'll see more ifdefs and duplication of functions here,
2594 since there is a different way to do threads on every OS. */
2596 /* Returns the number of threads for the process. */
2598 #if defined (PIOCNTHR) && defined (PIOCTLIST)
2601 proc_get_nthreads (procinfo *pi)
2605 if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0)
2606 proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__);
2612 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
2613 /* Solaris version */
2615 proc_get_nthreads (procinfo *pi)
2617 if (!pi->status_valid)
2618 if (!proc_get_status (pi))
2621 /* NEW_PROC_API: only works for the process procinfo, because the
2622 LWP procinfos do not get prstatus filled in. */
2624 if (pi->tid != 0) /* Find the parent process procinfo. */
2625 pi = find_procinfo_or_die (pi->pid, 0);
2627 return pi->prstatus.pr_nlwp;
2631 /* Default version */
2633 proc_get_nthreads (procinfo *pi)
2642 Return the ID of the thread that had an event of interest.
2643 (ie. the one that hit a breakpoint or other traced event). All
2644 other things being equal, this should be the ID of a thread that is
2645 currently executing. */
2647 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
2648 /* Solaris version */
2650 proc_get_current_thread (procinfo *pi)
2652 /* Note: this should be applied to the root procinfo for the
2653 process, not to the procinfo for an LWP. If applied to the
2654 procinfo for an LWP, it will simply return that LWP's ID. In
2655 that case, find the parent process procinfo. */
2658 pi = find_procinfo_or_die (pi->pid, 0);
2660 if (!pi->status_valid)
2661 if (!proc_get_status (pi))
2665 return pi->prstatus.pr_lwp.pr_lwpid;
2667 return pi->prstatus.pr_who;
2672 #if defined (PIOCNTHR) && defined (PIOCTLIST)
2675 proc_get_current_thread (procinfo *pi)
2677 #if 0 /* FIXME: not ready for prime time? */
2678 return pi->prstatus.pr_tid;
2685 /* Default version */
2687 proc_get_current_thread (procinfo *pi)
2695 /* Discover the IDs of all the threads within the process, and create
2696 a procinfo for each of them (chained to the parent). This
2697 unfortunately requires a different method on every OS. Returns
2698 non-zero for success, zero for failure. */
2701 proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore)
2703 if (thread && parent) /* sanity */
2705 thread->status_valid = 0;
2706 if (!proc_get_status (thread))
2707 destroy_one_procinfo (&parent->thread_list, thread);
2709 return 0; /* keep iterating */
2712 #if defined (PIOCLSTATUS)
2713 /* Solaris 2.5 (ioctl) version */
2715 proc_update_threads (procinfo *pi)
2717 gdb_prstatus_t *prstatus;
2718 struct cleanup *old_chain = NULL;
2722 /* We should never have to apply this operation to any procinfo
2723 except the one for the main process. If that ever changes for
2724 any reason, then take out the following clause and replace it
2725 with one that makes sure the ctl_fd is open. */
2728 pi = find_procinfo_or_die (pi->pid, 0);
2730 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
2732 if ((nlwp = proc_get_nthreads (pi)) <= 1)
2733 return 1; /* Process is not multi-threaded; nothing to do. */
2735 prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1));
2737 old_chain = make_cleanup (xfree, prstatus);
2738 if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0)
2739 proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__);
2741 /* Skip element zero, which represents the process as a whole. */
2742 for (i = 1; i < nlwp + 1; i++)
2744 if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL)
2745 proc_error (pi, "update_threads, create_procinfo", __LINE__);
2747 memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus));
2748 thread->status_valid = 1;
2750 pi->threads_valid = 1;
2751 do_cleanups (old_chain);
2756 /* Solaris 6 (and later) version. */
2758 do_closedir_cleanup (void *dir)
2764 proc_update_threads (procinfo *pi)
2766 char pathname[MAX_PROC_NAME_SIZE + 16];
2767 struct dirent *direntry;
2768 struct cleanup *old_chain = NULL;
2773 /* We should never have to apply this operation to any procinfo
2774 except the one for the main process. If that ever changes for
2775 any reason, then take out the following clause and replace it
2776 with one that makes sure the ctl_fd is open. */
2779 pi = find_procinfo_or_die (pi->pid, 0);
2781 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
2783 /* Note: this brute-force method was originally devised for Unixware
2784 (support removed since), and will also work on Solaris 2.6 and
2785 2.7. The original comment mentioned the existence of a much
2786 simpler and more elegant way to do this on Solaris, but didn't
2787 point out what that was. */
2789 strcpy (pathname, pi->pathname);
2790 strcat (pathname, "/lwp");
2791 if ((dirp = opendir (pathname)) == NULL)
2792 proc_error (pi, "update_threads, opendir", __LINE__);
2794 old_chain = make_cleanup (do_closedir_cleanup, dirp);
2795 while ((direntry = readdir (dirp)) != NULL)
2796 if (direntry->d_name[0] != '.') /* skip '.' and '..' */
2798 lwpid = atoi (&direntry->d_name[0]);
2799 if ((thread = create_procinfo (pi->pid, lwpid)) == NULL)
2800 proc_error (pi, "update_threads, create_procinfo", __LINE__);
2802 pi->threads_valid = 1;
2803 do_cleanups (old_chain);
2810 proc_update_threads (procinfo *pi)
2815 /* We should never have to apply this operation to any procinfo
2816 except the one for the main process. If that ever changes for
2817 any reason, then take out the following clause and replace it
2818 with one that makes sure the ctl_fd is open. */
2821 pi = find_procinfo_or_die (pi->pid, 0);
2823 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
2825 nthreads = proc_get_nthreads (pi);
2827 return 0; /* Nothing to do for 1 or fewer threads. */
2829 threads = xmalloc (nthreads * sizeof (tid_t));
2831 if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0)
2832 proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__);
2834 for (i = 0; i < nthreads; i++)
2836 if (!find_procinfo (pi->pid, threads[i]))
2837 if (!create_procinfo (pi->pid, threads[i]))
2838 proc_error (pi, "update_threads, create_procinfo", __LINE__);
2840 pi->threads_valid = 1;
2844 /* Default version */
2846 proc_update_threads (procinfo *pi)
2850 #endif /* OSF PIOCTLIST */
2851 #endif /* NEW_PROC_API */
2852 #endif /* SOL 2.5 PIOCLSTATUS */
2854 /* Given a pointer to a function, call that function once for each lwp
2855 in the procinfo list, until the function returns non-zero, in which
2856 event return the value returned by the function.
2858 Note: this function does NOT call update_threads. If you want to
2859 discover new threads first, you must call that function explicitly.
2860 This function just makes a quick pass over the currently-known
2863 PI is the parent process procinfo. FUNC is the per-thread
2864 function. PTR is an opaque parameter for function. Returns the
2865 first non-zero return value from the callee, or zero. */
2868 proc_iterate_over_threads (procinfo *pi,
2869 int (*func) (procinfo *, procinfo *, void *),
2872 procinfo *thread, *next;
2875 /* We should never have to apply this operation to any procinfo
2876 except the one for the main process. If that ever changes for
2877 any reason, then take out the following clause and replace it
2878 with one that makes sure the ctl_fd is open. */
2881 pi = find_procinfo_or_die (pi->pid, 0);
2883 for (thread = pi->thread_list; thread != NULL; thread = next)
2885 next = thread->next; /* In case thread is destroyed. */
2886 if ((retval = (*func) (pi, thread, ptr)) != 0)
2893 /* =================== END, Thread "MODULE" =================== */
2895 /* =================== END, /proc "MODULE" =================== */
2897 /* =================== GDB "MODULE" =================== */
2899 /* Here are all of the gdb target vector functions and their
2902 static ptid_t do_attach (ptid_t ptid);
2903 static void do_detach (int signo);
2904 static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum,
2905 int entry_or_exit, int mode, int from_tty);
2907 /* On mips-irix, we need to insert a breakpoint at __dbx_link during
2908 the startup phase. The following two variables are used to record
2909 the address of the breakpoint, and the code that was replaced by
2911 static int dbx_link_bpt_addr = 0;
2912 static void *dbx_link_bpt;
2914 /* Sets up the inferior to be debugged. Registers to trace signals,
2915 hardware faults, and syscalls. Note: does not set RLC flag: caller
2916 may want to customize that. Returns zero for success (note!
2917 unlike most functions in this module); on failure, returns the LINE
2918 NUMBER where it failed! */
2921 procfs_debug_inferior (procinfo *pi)
2923 fltset_t traced_faults;
2924 gdb_sigset_t traced_signals;
2925 sysset_t *traced_syscall_entries;
2926 sysset_t *traced_syscall_exits;
2929 #ifdef PROCFS_DONT_TRACE_FAULTS
2930 /* On some systems (OSF), we don't trace hardware faults.
2931 Apparently it's enough that we catch them as signals.
2932 Wonder why we don't just do that in general? */
2933 premptyset (&traced_faults); /* don't trace faults. */
2935 /* Register to trace hardware faults in the child. */
2936 prfillset (&traced_faults); /* trace all faults... */
2937 gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */
2939 if (!proc_set_traced_faults (pi, &traced_faults))
2942 /* Initially, register to trace all signals in the child. */
2943 prfillset (&traced_signals);
2944 if (!proc_set_traced_signals (pi, &traced_signals))
2948 /* Register to trace the 'exit' system call (on entry). */
2949 traced_syscall_entries = sysset_t_alloc (pi);
2950 gdb_premptysysset (traced_syscall_entries);
2952 gdb_praddsysset (traced_syscall_entries, SYS_exit);
2955 gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */
2958 gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit);
2960 #ifdef DYNAMIC_SYSCALLS
2962 int callnum = find_syscall (pi, "_exit");
2965 gdb_praddsysset (traced_syscall_entries, callnum);
2969 status = proc_set_traced_sysentry (pi, traced_syscall_entries);
2970 xfree (traced_syscall_entries);
2974 #ifdef PRFS_STOPEXEC /* defined on OSF */
2975 /* OSF method for tracing exec syscalls. Quoting:
2976 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2977 exits from exec system calls because of the user level loader. */
2978 /* FIXME: make nice and maybe move into an access function. */
2982 if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
2985 prfs_flags |= PRFS_STOPEXEC;
2987 if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
2990 #else /* not PRFS_STOPEXEC */
2991 /* Everyone else's (except OSF) method for tracing exec syscalls. */
2993 Not all systems with /proc have all the exec* syscalls with the same
2994 names. On the SGI, for example, there is no SYS_exec, but there
2995 *is* a SYS_execv. So, we try to account for that. */
2997 traced_syscall_exits = sysset_t_alloc (pi);
2998 gdb_premptysysset (traced_syscall_exits);
3000 gdb_praddsysset (traced_syscall_exits, SYS_exec);
3003 gdb_praddsysset (traced_syscall_exits, SYS_execve);
3006 gdb_praddsysset (traced_syscall_exits, SYS_execv);
3009 #ifdef SYS_lwpcreate
3010 gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate);
3011 gdb_praddsysset (traced_syscall_exits, SYS_lwpexit);
3014 #ifdef SYS_lwp_create /* FIXME: once only, please. */
3015 gdb_praddsysset (traced_syscall_exits, SYS_lwp_create);
3016 gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit);
3019 #ifdef DYNAMIC_SYSCALLS
3021 int callnum = find_syscall (pi, "execve");
3024 gdb_praddsysset (traced_syscall_exits, callnum);
3025 callnum = find_syscall (pi, "ra_execve");
3027 gdb_praddsysset (traced_syscall_exits, callnum);
3031 status = proc_set_traced_sysexit (pi, traced_syscall_exits);
3032 xfree (traced_syscall_exits);
3036 #endif /* PRFS_STOPEXEC */
3041 procfs_attach (struct target_ops *ops, char *args, int from_tty)
3046 pid = parse_pid_to_attach (args);
3048 if (pid == getpid ())
3049 error (_("Attaching GDB to itself is not a good idea..."));
3053 exec_file = get_exec_file (0);
3056 printf_filtered (_("Attaching to program `%s', %s\n"),
3057 exec_file, target_pid_to_str (pid_to_ptid (pid)));
3059 printf_filtered (_("Attaching to %s\n"),
3060 target_pid_to_str (pid_to_ptid (pid)));
3064 inferior_ptid = do_attach (pid_to_ptid (pid));
3069 procfs_detach (struct target_ops *ops, const char *args, int from_tty)
3072 int pid = ptid_get_pid (inferior_ptid);
3081 exec_file = get_exec_file (0);
3082 if (exec_file == NULL)
3085 printf_filtered (_("Detaching from program: %s, %s\n"), exec_file,
3086 target_pid_to_str (pid_to_ptid (pid)));
3087 gdb_flush (gdb_stdout);
3092 inferior_ptid = null_ptid;
3093 detach_inferior (pid);
3094 unpush_target (ops);
3098 do_attach (ptid_t ptid)
3101 struct inferior *inf;
3105 if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL)
3106 perror (_("procfs: out of memory in 'attach'"));
3108 if (!open_procinfo_files (pi, FD_CTL))
3110 fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__);
3111 sprintf (errmsg, "do_attach: couldn't open /proc file for process %d",
3112 ptid_get_pid (ptid));
3113 dead_procinfo (pi, errmsg, NOKILL);
3116 /* Stop the process (if it isn't already stopped). */
3117 if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
3119 pi->was_stopped = 1;
3120 proc_prettyprint_why (proc_why (pi), proc_what (pi), 1);
3124 pi->was_stopped = 0;
3125 /* Set the process to run again when we close it. */
3126 if (!proc_set_run_on_last_close (pi))
3127 dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL);
3129 /* Now stop the process. */
3130 if (!proc_stop_process (pi))
3131 dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL);
3132 pi->ignore_next_sigstop = 1;
3134 /* Save some of the /proc state to be restored if we detach. */
3135 if (!proc_get_traced_faults (pi, &pi->saved_fltset))
3136 dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL);
3137 if (!proc_get_traced_signals (pi, &pi->saved_sigset))
3138 dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL);
3139 if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
3140 dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.",
3142 if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
3143 dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.",
3145 if (!proc_get_held_signals (pi, &pi->saved_sighold))
3146 dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL);
3148 if ((fail = procfs_debug_inferior (pi)) != 0)
3149 dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL);
3151 inf = current_inferior ();
3152 inferior_appeared (inf, pi->pid);
3153 /* Let GDB know that the inferior was attached. */
3154 inf->attach_flag = 1;
3156 /* Create a procinfo for the current lwp. */
3157 lwpid = proc_get_current_thread (pi);
3158 create_procinfo (pi->pid, lwpid);
3160 /* Add it to gdb's thread list. */
3161 ptid = ptid_build (pi->pid, lwpid, 0);
3168 do_detach (int signo)
3172 /* Find procinfo for the main process. */
3173 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid),
3174 0); /* FIXME: threads */
3176 if (!proc_set_current_signal (pi, signo))
3177 proc_warn (pi, "do_detach, set_current_signal", __LINE__);
3179 if (!proc_set_traced_signals (pi, &pi->saved_sigset))
3180 proc_warn (pi, "do_detach, set_traced_signal", __LINE__);
3182 if (!proc_set_traced_faults (pi, &pi->saved_fltset))
3183 proc_warn (pi, "do_detach, set_traced_faults", __LINE__);
3185 if (!proc_set_traced_sysentry (pi, pi->saved_entryset))
3186 proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__);
3188 if (!proc_set_traced_sysexit (pi, pi->saved_exitset))
3189 proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__);
3191 if (!proc_set_held_signals (pi, &pi->saved_sighold))
3192 proc_warn (pi, "do_detach, set_held_signals", __LINE__);
3194 if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)))
3195 if (signo || !(pi->was_stopped) ||
3196 query (_("Was stopped when attached, make it runnable again? ")))
3198 /* Clear any pending signal. */
3199 if (!proc_clear_current_fault (pi))
3200 proc_warn (pi, "do_detach, clear_current_fault", __LINE__);
3202 if (signo == 0 && !proc_clear_current_signal (pi))
3203 proc_warn (pi, "do_detach, clear_current_signal", __LINE__);
3205 if (!proc_set_run_on_last_close (pi))
3206 proc_warn (pi, "do_detach, set_rlc", __LINE__);
3209 destroy_procinfo (pi);
3212 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
3215 ??? Is the following note still relevant? We can't get individual
3216 registers with the PT_GETREGS ptrace(2) request either, yet we
3217 don't bother with caching at all in that case.
3219 NOTE: Since the /proc interface cannot give us individual
3220 registers, we pay no attention to REGNUM, and just fetch them all.
3221 This results in the possibility that we will do unnecessarily many
3222 fetches, since we may be called repeatedly for individual
3223 registers. So we cache the results, and mark the cache invalid
3224 when the process is resumed. */
3227 procfs_fetch_registers (struct target_ops *ops,
3228 struct regcache *regcache, int regnum)
3230 gdb_gregset_t *gregs;
3232 int pid = ptid_get_pid (inferior_ptid);
3233 int tid = ptid_get_lwp (inferior_ptid);
3234 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3236 pi = find_procinfo_or_die (pid, tid);
3239 error (_("procfs: fetch_registers failed to find procinfo for %s"),
3240 target_pid_to_str (inferior_ptid));
3242 gregs = proc_get_gregs (pi);
3244 proc_error (pi, "fetch_registers, get_gregs", __LINE__);
3246 supply_gregset (regcache, (const gdb_gregset_t *) gregs);
3248 if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
3250 gdb_fpregset_t *fpregs;
3252 if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
3253 || regnum == gdbarch_pc_regnum (gdbarch)
3254 || regnum == gdbarch_sp_regnum (gdbarch))
3255 return; /* Not a floating point register. */
3257 fpregs = proc_get_fpregs (pi);
3259 proc_error (pi, "fetch_registers, get_fpregs", __LINE__);
3261 supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs);
3265 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
3266 this for all registers.
3268 NOTE: Since the /proc interface will not read individual registers,
3269 we will cache these requests until the process is resumed, and only
3270 then write them back to the inferior process.
3272 FIXME: is that a really bad idea? Have to think about cases where
3273 writing one register might affect the value of others, etc. */
3276 procfs_store_registers (struct target_ops *ops,
3277 struct regcache *regcache, int regnum)
3279 gdb_gregset_t *gregs;
3281 int pid = ptid_get_pid (inferior_ptid);
3282 int tid = ptid_get_lwp (inferior_ptid);
3283 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3285 pi = find_procinfo_or_die (pid, tid);
3288 error (_("procfs: store_registers: failed to find procinfo for %s"),
3289 target_pid_to_str (inferior_ptid));
3291 gregs = proc_get_gregs (pi);
3293 proc_error (pi, "store_registers, get_gregs", __LINE__);
3295 fill_gregset (regcache, gregs, regnum);
3296 if (!proc_set_gregs (pi))
3297 proc_error (pi, "store_registers, set_gregs", __LINE__);
3299 if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
3301 gdb_fpregset_t *fpregs;
3303 if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
3304 || regnum == gdbarch_pc_regnum (gdbarch)
3305 || regnum == gdbarch_sp_regnum (gdbarch))
3306 return; /* Not a floating point register. */
3308 fpregs = proc_get_fpregs (pi);
3310 proc_error (pi, "store_registers, get_fpregs", __LINE__);
3312 fill_fpregset (regcache, fpregs, regnum);
3313 if (!proc_set_fpregs (pi))
3314 proc_error (pi, "store_registers, set_fpregs", __LINE__);
3319 syscall_is_lwp_exit (procinfo *pi, int scall)
3322 if (scall == SYS_lwp_exit)
3326 if (scall == SYS_lwpexit)
3333 syscall_is_exit (procinfo *pi, int scall)
3336 if (scall == SYS_exit)
3339 #ifdef DYNAMIC_SYSCALLS
3340 if (find_syscall (pi, "_exit") == scall)
3347 syscall_is_exec (procinfo *pi, int scall)
3350 if (scall == SYS_exec)
3354 if (scall == SYS_execv)
3358 if (scall == SYS_execve)
3361 #ifdef DYNAMIC_SYSCALLS
3362 if (find_syscall (pi, "_execve"))
3364 if (find_syscall (pi, "ra_execve"))
3371 syscall_is_lwp_create (procinfo *pi, int scall)
3373 #ifdef SYS_lwp_create
3374 if (scall == SYS_lwp_create)
3377 #ifdef SYS_lwpcreate
3378 if (scall == SYS_lwpcreate)
3384 /* Remove the breakpoint that we inserted in __dbx_link().
3385 Does nothing if the breakpoint hasn't been inserted or has already
3389 remove_dbx_link_breakpoint (void)
3391 if (dbx_link_bpt_addr == 0)
3394 if (deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt) != 0)
3395 warning (_("Unable to remove __dbx_link breakpoint."));
3397 dbx_link_bpt_addr = 0;
3398 dbx_link_bpt = NULL;
3402 /* Return the address of the __dbx_link() function in the file
3403 refernced by ABFD by scanning its symbol table. Return 0 if
3404 the symbol was not found. */
3407 dbx_link_addr (bfd *abfd)
3409 long storage_needed;
3410 asymbol **symbol_table;
3411 long number_of_symbols;
3414 storage_needed = bfd_get_symtab_upper_bound (abfd);
3415 if (storage_needed <= 0)
3418 symbol_table = (asymbol **) xmalloc (storage_needed);
3419 make_cleanup (xfree, symbol_table);
3421 number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
3423 for (i = 0; i < number_of_symbols; i++)
3425 asymbol *sym = symbol_table[i];
3427 if ((sym->flags & BSF_GLOBAL)
3428 && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0)
3429 return (sym->value + sym->section->vma);
3432 /* Symbol not found, return NULL. */
3436 /* Search the symbol table of the file referenced by FD for a symbol
3437 named __dbx_link(). If found, then insert a breakpoint at this location,
3438 and return nonzero. Return zero otherwise. */
3441 insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored)
3444 long storage_needed;
3447 abfd = gdb_bfd_fdopenr ("unamed", 0, fd);
3450 warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ()));
3454 if (!bfd_check_format (abfd, bfd_object))
3456 /* Not the correct format, so we can not possibly find the dbx_link
3458 gdb_bfd_unref (abfd);
3462 sym_addr = dbx_link_addr (abfd);
3465 /* Insert the breakpoint. */
3466 dbx_link_bpt_addr = sym_addr;
3467 dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch (), NULL,
3469 if (dbx_link_bpt == NULL)
3471 warning (_("Failed to insert dbx_link breakpoint."));
3472 gdb_bfd_unref (abfd);
3475 gdb_bfd_unref (abfd);
3479 gdb_bfd_unref (abfd);
3483 /* Calls the supplied callback function once for each mapped address
3484 space in the process. The callback function receives an open file
3485 descriptor for the file corresponding to that mapped address space
3486 (if there is one), and the base address of the mapped space. Quit
3487 when the callback function returns a nonzero value, or at teh end
3488 of the mappings. Returns the first non-zero return value of the
3489 callback function, or zero. */
3492 solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR),
3495 procinfo *pi = data;
3499 char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)];
3501 if (map->pr_vaddr == 0 && map->pr_size == 0)
3502 return -1; /* sanity */
3504 if (map->pr_mapname[0] == 0)
3506 fd = -1; /* no map file */
3510 sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname);
3511 /* Note: caller's responsibility to close this fd! */
3512 fd = open_with_retry (name, O_RDONLY);
3513 /* Note: we don't test the above call for failure;
3514 we just pass the FD on as given. Sometimes there is
3515 no file, so the open may return failure, but that's
3519 fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr);
3520 /* Note: we don't test the above call for failure;
3521 we just pass the FD on as given. Sometimes there is
3522 no file, so the ioctl may return failure, but that's
3525 return (*func) (fd, (CORE_ADDR) map->pr_vaddr);
3528 /* If the given memory region MAP contains a symbol named __dbx_link,
3529 insert a breakpoint at this location and return nonzero. Return
3533 insert_dbx_link_bpt_in_region (struct prmap *map,
3534 find_memory_region_ftype child_func,
3537 procinfo *pi = (procinfo *) data;
3539 /* We know the symbol we're looking for is in a text region, so
3540 only look for it if the region is a text one. */
3541 if (map->pr_mflags & MA_EXEC)
3542 return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi);
3547 /* Search all memory regions for a symbol named __dbx_link. If found,
3548 insert a breakpoint at its location, and return nonzero. Return zero
3552 insert_dbx_link_breakpoint (procinfo *pi)
3554 return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region);
3558 /* Retrieve the next stop event from the child process. If child has
3559 not stopped yet, wait for it to stop. Translate /proc eventcodes
3560 (or possibly wait eventcodes) into gdb internal event codes.
3561 Returns the id of process (and possibly thread) that incurred the
3562 event. Event codes are returned through a pointer parameter. */
3565 procfs_wait (struct target_ops *ops,
3566 ptid_t ptid, struct target_waitstatus *status, int options)
3568 /* First cut: loosely based on original version 2.1. */
3572 ptid_t retval, temp_ptid;
3573 int why, what, flags;
3580 retval = pid_to_ptid (-1);
3582 /* Find procinfo for main process. */
3583 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
3586 /* We must assume that the status is stale now... */
3587 pi->status_valid = 0;
3588 pi->gregs_valid = 0;
3589 pi->fpregs_valid = 0;
3591 #if 0 /* just try this out... */
3592 flags = proc_flags (pi);
3593 why = proc_why (pi);
3594 if ((flags & PR_STOPPED) && (why == PR_REQUESTED))
3595 pi->status_valid = 0; /* re-read again, IMMEDIATELY... */
3597 /* If child is not stopped, wait for it to stop. */
3598 if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) &&
3599 !proc_wait_for_stop (pi))
3601 /* wait_for_stop failed: has the child terminated? */
3602 if (errno == ENOENT)
3606 /* /proc file not found; presumably child has terminated. */
3607 wait_retval = wait (&wstat); /* "wait" for the child's exit. */
3610 if (wait_retval != ptid_get_pid (inferior_ptid))
3611 error (_("procfs: couldn't stop "
3612 "process %d: wait returned %d."),
3613 ptid_get_pid (inferior_ptid), wait_retval);
3614 /* FIXME: might I not just use waitpid?
3615 Or try find_procinfo to see if I know about this child? */
3616 retval = pid_to_ptid (wait_retval);
3618 else if (errno == EINTR)
3622 /* Unknown error from wait_for_stop. */
3623 proc_error (pi, "target_wait (wait_for_stop)", __LINE__);
3628 /* This long block is reached if either:
3629 a) the child was already stopped, or
3630 b) we successfully waited for the child with wait_for_stop.
3631 This block will analyze the /proc status, and translate it
3632 into a waitstatus for GDB.
3634 If we actually had to call wait because the /proc file
3635 is gone (child terminated), then we skip this block,
3636 because we already have a waitstatus. */
3638 flags = proc_flags (pi);
3639 why = proc_why (pi);
3640 what = proc_what (pi);
3642 if (flags & (PR_STOPPED | PR_ISTOP))
3645 /* If it's running async (for single_thread control),
3646 set it back to normal again. */
3647 if (flags & PR_ASYNC)
3648 if (!proc_unset_async (pi))
3649 proc_error (pi, "target_wait, unset_async", __LINE__);
3653 proc_prettyprint_why (why, what, 1);
3655 /* The 'pid' we will return to GDB is composed of
3656 the process ID plus the lwp ID. */
3657 retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0);
3661 wstat = (what << 8) | 0177;
3664 if (syscall_is_lwp_exit (pi, what))
3666 if (print_thread_events)
3667 printf_unfiltered (_("[%s exited]\n"),
3668 target_pid_to_str (retval));
3669 delete_thread (retval);
3670 status->kind = TARGET_WAITKIND_SPURIOUS;
3673 else if (syscall_is_exit (pi, what))
3675 struct inferior *inf;
3677 /* Handle SYS_exit call only. */
3678 /* Stopped at entry to SYS_exit.
3679 Make it runnable, resume it, then use
3680 the wait system call to get its exit code.
3681 Proc_run_process always clears the current
3683 Then return its exit status. */
3684 pi->status_valid = 0;
3686 /* FIXME: what we should do is return
3687 TARGET_WAITKIND_SPURIOUS. */
3688 if (!proc_run_process (pi, 0, 0))
3689 proc_error (pi, "target_wait, run_process", __LINE__);
3691 inf = find_inferior_pid (pi->pid);
3692 if (inf->attach_flag)
3694 /* Don't call wait: simulate waiting for exit,
3695 return a "success" exit code. Bogus: what if
3696 it returns something else? */
3698 retval = inferior_ptid; /* ? ? ? */
3702 int temp = wait (&wstat);
3704 /* FIXME: shouldn't I make sure I get the right
3705 event from the right process? If (for
3706 instance) I have killed an earlier inferior
3707 process but failed to clean up after it
3708 somehow, I could get its termination event
3711 /* If wait returns -1, that's what we return
3714 retval = pid_to_ptid (temp);
3719 printf_filtered (_("procfs: trapped on entry to "));
3720 proc_prettyprint_syscall (proc_what (pi), 0);
3721 printf_filtered ("\n");
3724 long i, nsysargs, *sysargs;
3726 if ((nsysargs = proc_nsysarg (pi)) > 0 &&
3727 (sysargs = proc_sysargs (pi)) != NULL)
3729 printf_filtered (_("%ld syscall arguments:\n"),
3731 for (i = 0; i < nsysargs; i++)
3732 printf_filtered ("#%ld: 0x%08lx\n",
3740 /* How to exit gracefully, returning "unknown
3742 status->kind = TARGET_WAITKIND_SPURIOUS;
3743 return inferior_ptid;
3747 /* How to keep going without returning to wfi: */
3748 target_resume (ptid, 0, GDB_SIGNAL_0);
3754 if (syscall_is_exec (pi, what))
3756 /* Hopefully this is our own "fork-child" execing
3757 the real child. Hoax this event into a trap, and
3758 GDB will see the child about to execute its start
3760 wstat = (SIGTRAP << 8) | 0177;
3763 else if (what == SYS_syssgi)
3765 /* see if we can break on dbx_link(). If yes, then
3766 we no longer need the SYS_syssgi notifications. */
3767 if (insert_dbx_link_breakpoint (pi))
3768 proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT,
3771 /* This is an internal event and should be transparent
3772 to wfi, so resume the execution and wait again. See
3773 comment in procfs_init_inferior() for more details. */
3774 target_resume (ptid, 0, GDB_SIGNAL_0);
3778 else if (syscall_is_lwp_create (pi, what))
3780 /* This syscall is somewhat like fork/exec. We
3781 will get the event twice: once for the parent
3782 LWP, and once for the child. We should already
3783 know about the parent LWP, but the child will
3784 be new to us. So, whenever we get this event,
3785 if it represents a new thread, simply add the
3786 thread to the list. */
3788 /* If not in procinfo list, add it. */
3789 temp_tid = proc_get_current_thread (pi);
3790 if (!find_procinfo (pi->pid, temp_tid))
3791 create_procinfo (pi->pid, temp_tid);
3793 temp_ptid = ptid_build (pi->pid, temp_tid, 0);
3794 /* If not in GDB's thread list, add it. */
3795 if (!in_thread_list (temp_ptid))
3796 add_thread (temp_ptid);
3798 /* Return to WFI, but tell it to immediately resume. */
3799 status->kind = TARGET_WAITKIND_SPURIOUS;
3800 return inferior_ptid;
3802 else if (syscall_is_lwp_exit (pi, what))
3804 if (print_thread_events)
3805 printf_unfiltered (_("[%s exited]\n"),
3806 target_pid_to_str (retval));
3807 delete_thread (retval);
3808 status->kind = TARGET_WAITKIND_SPURIOUS;
3813 /* FIXME: Do we need to handle SYS_sproc,
3814 SYS_fork, or SYS_vfork here? The old procfs
3815 seemed to use this event to handle threads on
3816 older (non-LWP) systems, where I'm assuming
3817 that threads were actually separate processes.
3818 Irix, maybe? Anyway, low priority for now. */
3822 printf_filtered (_("procfs: trapped on exit from "));
3823 proc_prettyprint_syscall (proc_what (pi), 0);
3824 printf_filtered ("\n");
3827 long i, nsysargs, *sysargs;
3829 if ((nsysargs = proc_nsysarg (pi)) > 0 &&
3830 (sysargs = proc_sysargs (pi)) != NULL)
3832 printf_filtered (_("%ld syscall arguments:\n"),
3834 for (i = 0; i < nsysargs; i++)
3835 printf_filtered ("#%ld: 0x%08lx\n",
3840 status->kind = TARGET_WAITKIND_SPURIOUS;
3841 return inferior_ptid;
3846 wstat = (SIGSTOP << 8) | 0177;
3851 printf_filtered (_("Retry #%d:\n"), retry);
3852 pi->status_valid = 0;
3857 /* If not in procinfo list, add it. */
3858 temp_tid = proc_get_current_thread (pi);
3859 if (!find_procinfo (pi->pid, temp_tid))
3860 create_procinfo (pi->pid, temp_tid);
3862 /* If not in GDB's thread list, add it. */
3863 temp_ptid = ptid_build (pi->pid, temp_tid, 0);
3864 if (!in_thread_list (temp_ptid))
3865 add_thread (temp_ptid);
3867 status->kind = TARGET_WAITKIND_STOPPED;
3868 status->value.sig = 0;
3873 wstat = (what << 8) | 0177;
3879 wstat = (SIGTRAP << 8) | 0177;
3884 wstat = (SIGTRAP << 8) | 0177;
3887 /* FIXME: use si_signo where possible. */
3889 #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */
3892 wstat = (SIGILL << 8) | 0177;
3895 #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */
3898 /* If we hit our __dbx_link() internal breakpoint,
3899 then remove it. See comments in procfs_init_inferior()
3900 for more details. */
3901 if (dbx_link_bpt_addr != 0
3902 && dbx_link_bpt_addr
3903 == regcache_read_pc (get_current_regcache ()))
3904 remove_dbx_link_breakpoint ();
3906 wstat = (SIGTRAP << 8) | 0177;
3910 #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */
3913 wstat = (SIGSEGV << 8) | 0177;
3917 #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */
3920 wstat = (SIGFPE << 8) | 0177;
3922 case FLTPAGE: /* Recoverable page fault */
3923 default: /* FIXME: use si_signo if possible for
3925 retval = pid_to_ptid (-1);
3926 printf_filtered ("procfs:%d -- ", __LINE__);
3927 printf_filtered (_("child stopped for unknown reason:\n"));
3928 proc_prettyprint_why (why, what, 1);
3929 error (_("... giving up..."));
3932 break; /* case PR_FAULTED: */
3933 default: /* switch (why) unmatched */
3934 printf_filtered ("procfs:%d -- ", __LINE__);
3935 printf_filtered (_("child stopped for unknown reason:\n"));
3936 proc_prettyprint_why (why, what, 1);
3937 error (_("... giving up..."));
3940 /* Got this far without error: If retval isn't in the
3941 threads database, add it. */
3942 if (ptid_get_pid (retval) > 0 &&
3943 !ptid_equal (retval, inferior_ptid) &&
3944 !in_thread_list (retval))
3946 /* We have a new thread. We need to add it both to
3947 GDB's list and to our own. If we don't create a
3948 procinfo, resume may be unhappy later. */
3949 add_thread (retval);
3950 if (find_procinfo (ptid_get_pid (retval),
3951 ptid_get_lwp (retval)) == NULL)
3952 create_procinfo (ptid_get_pid (retval),
3953 ptid_get_lwp (retval));
3956 else /* Flags do not indicate STOPPED. */
3958 /* surely this can't happen... */
3959 printf_filtered ("procfs:%d -- process not stopped.\n",
3961 proc_prettyprint_flags (flags, 1);
3962 error (_("procfs: ...giving up..."));
3967 store_waitstatus (status, wstat);
3973 /* Perform a partial transfer to/from the specified object. For
3974 memory transfers, fall back to the old memory xfer functions. */
3977 procfs_xfer_partial (struct target_ops *ops, enum target_object object,
3978 const char *annex, gdb_byte *readbuf,
3979 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len)
3983 case TARGET_OBJECT_MEMORY:
3985 return (*ops->deprecated_xfer_memory) (offset, readbuf,
3986 len, 0/*read*/, NULL, ops);
3988 return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf,
3989 len, 1/*write*/, NULL, ops);
3993 case TARGET_OBJECT_AUXV:
3994 return memory_xfer_auxv (ops, object, annex, readbuf, writebuf,
3999 if (ops->beneath != NULL)
4000 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
4001 readbuf, writebuf, offset, len);
4007 /* Transfer LEN bytes between GDB address MYADDR and target address
4008 MEMADDR. If DOWRITE is non-zero, transfer them to the target,
4009 otherwise transfer them from the target. TARGET is unused.
4011 The return value is 0 if an error occurred or no bytes were
4012 transferred. Otherwise, it will be a positive value which
4013 indicates the number of bytes transferred between gdb and the
4014 target. (Note that the interface also makes provisions for
4015 negative values, but this capability isn't implemented here.) */
4018 procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite,
4019 struct mem_attrib *attrib, struct target_ops *target)
4024 /* Find procinfo for main process. */
4025 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4026 if (pi->as_fd == 0 &&
4027 open_procinfo_files (pi, FD_AS) == 0)
4029 proc_warn (pi, "xfer_memory, open_proc_files", __LINE__);
4033 if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
4038 PROCFS_NOTE ("write memory:\n");
4040 PROCFS_NOTE ("write memory:\n");
4042 nbytes = write (pi->as_fd, myaddr, len);
4046 PROCFS_NOTE ("read memory:\n");
4047 nbytes = read (pi->as_fd, myaddr, len);
4057 /* Called by target_resume before making child runnable. Mark cached
4058 registers and status's invalid. If there are "dirty" caches that
4059 need to be written back to the child process, do that.
4061 File descriptors are also cached. As they are a limited resource,
4062 we cannot hold onto them indefinitely. However, as they are
4063 expensive to open, we don't want to throw them away
4064 indescriminately either. As a compromise, we will keep the file
4065 descriptors for the parent process, but discard any file
4066 descriptors we may have accumulated for the threads.
4068 As this function is called by iterate_over_threads, it always
4069 returns zero (so that iterate_over_threads will keep
4073 invalidate_cache (procinfo *parent, procinfo *pi, void *ptr)
4075 /* About to run the child; invalidate caches and do any other
4079 if (pi->gregs_dirty)
4080 if (parent == NULL ||
4081 proc_get_current_thread (parent) != pi->tid)
4082 if (!proc_set_gregs (pi)) /* flush gregs cache */
4083 proc_warn (pi, "target_resume, set_gregs",
4085 if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0)
4086 if (pi->fpregs_dirty)
4087 if (parent == NULL ||
4088 proc_get_current_thread (parent) != pi->tid)
4089 if (!proc_set_fpregs (pi)) /* flush fpregs cache */
4090 proc_warn (pi, "target_resume, set_fpregs",
4096 /* The presence of a parent indicates that this is an LWP.
4097 Close any file descriptors that it might have open.
4098 We don't do this to the master (parent) procinfo. */
4100 close_procinfo_files (pi);
4102 pi->gregs_valid = 0;
4103 pi->fpregs_valid = 0;
4105 pi->gregs_dirty = 0;
4106 pi->fpregs_dirty = 0;
4108 pi->status_valid = 0;
4109 pi->threads_valid = 0;
4115 /* A callback function for iterate_over_threads. Find the
4116 asynchronous signal thread, and make it runnable. See if that
4117 helps matters any. */
4120 make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr)
4123 if (proc_flags (pi) & PR_ASLWP)
4125 if (!proc_run_process (pi, 0, -1))
4126 proc_error (pi, "make_signal_thread_runnable", __LINE__);
4134 /* Make the child process runnable. Normally we will then call
4135 procfs_wait and wait for it to stop again (unless gdb is async).
4137 If STEP is true, then arrange for the child to stop again after
4138 executing a single instruction. If SIGNO is zero, then cancel any
4139 pending signal; if non-zero, then arrange for the indicated signal
4140 to be delivered to the child when it runs. If PID is -1, then
4141 allow any child thread to run; if non-zero, then allow only the
4142 indicated thread to run. (not implemented yet). */
4145 procfs_resume (struct target_ops *ops,
4146 ptid_t ptid, int step, enum gdb_signal signo)
4148 procinfo *pi, *thread;
4152 prrun.prflags |= PRSVADDR;
4153 prrun.pr_vaddr = $PC; set resume address
4154 prrun.prflags |= PRSTRACE; trace signals in pr_trace (all)
4155 prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE)
4156 prrun.prflags |= PRCFAULT; clear current fault.
4158 PRSTRACE and PRSFAULT can be done by other means
4159 (proc_trace_signals, proc_trace_faults)
4160 PRSVADDR is unnecessary.
4161 PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault)
4162 This basically leaves PRSTEP and PRCSIG.
4163 PRCSIG is like PIOCSSIG (proc_clear_current_signal).
4164 So basically PR_STEP is the sole argument that must be passed
4165 to proc_run_process (for use in the prrun struct by ioctl). */
4167 /* Find procinfo for main process. */
4168 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4170 /* First cut: ignore pid argument. */
4173 /* Convert signal to host numbering. */
4175 (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop))
4178 native_signo = gdb_signal_to_host (signo);
4180 pi->ignore_next_sigstop = 0;
4182 /* Running the process voids all cached registers and status. */
4183 /* Void the threads' caches first. */
4184 proc_iterate_over_threads (pi, invalidate_cache, NULL);
4185 /* Void the process procinfo's caches. */
4186 invalidate_cache (NULL, pi, NULL);
4188 if (ptid_get_pid (ptid) != -1)
4190 /* Resume a specific thread, presumably suppressing the
4192 thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid));
4195 if (thread->tid != 0)
4197 /* We're to resume a specific thread, and not the
4198 others. Set the child process's PR_ASYNC flag. */
4200 if (!proc_set_async (pi))
4201 proc_error (pi, "target_resume, set_async", __LINE__);
4204 proc_iterate_over_threads (pi,
4205 make_signal_thread_runnable,
4208 pi = thread; /* Substitute the thread's procinfo
4214 if (!proc_run_process (pi, step, native_signo))
4217 warning (_("resume: target already running. "
4218 "Pretend to resume, and hope for the best!"));
4220 proc_error (pi, "target_resume", __LINE__);
4224 /* Set up to trace signals in the child process. */
4227 procfs_pass_signals (int numsigs, unsigned char *pass_signals)
4229 gdb_sigset_t signals;
4230 procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4233 prfillset (&signals);
4235 for (signo = 0; signo < NSIG; signo++)
4237 int target_signo = gdb_signal_from_host (signo);
4238 if (target_signo < numsigs && pass_signals[target_signo])
4239 gdb_prdelset (&signals, signo);
4242 if (!proc_set_traced_signals (pi, &signals))
4243 proc_error (pi, "pass_signals", __LINE__);
4246 /* Print status information about the child process. */
4249 procfs_files_info (struct target_ops *ignore)
4251 struct inferior *inf = current_inferior ();
4253 printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"),
4254 inf->attach_flag? "attached": "child",
4255 target_pid_to_str (inferior_ptid));
4258 /* Stop the child process asynchronously, as when the gdb user types
4259 control-c or presses a "stop" button. Works by sending
4260 kill(SIGINT) to the child's process group. */
4263 procfs_stop (ptid_t ptid)
4265 kill (-inferior_process_group (), SIGINT);
4268 /* Make it die. Wait for it to die. Clean up after it. Note: this
4269 should only be applied to the real process, not to an LWP, because
4270 of the check for parent-process. If we need this to work for an
4271 LWP, it needs some more logic. */
4274 unconditionally_kill_inferior (procinfo *pi)
4278 parent_pid = proc_parent_pid (pi);
4279 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
4280 /* FIXME: use access functions. */
4281 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
4282 before the PIOCKILL, otherwise it might generate a corrupted core
4283 file for the inferior. */
4284 if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0)
4286 printf_filtered ("unconditionally_kill: SSIG failed!\n");
4289 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
4290 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
4291 to kill the inferior, otherwise it might remain stopped with a
4293 We do not check the result of the PIOCSSIG, the inferior might have
4296 gdb_siginfo_t newsiginfo;
4298 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
4299 newsiginfo.si_signo = SIGKILL;
4300 newsiginfo.si_code = 0;
4301 newsiginfo.si_errno = 0;
4302 newsiginfo.si_pid = getpid ();
4303 newsiginfo.si_uid = getuid ();
4304 /* FIXME: use proc_set_current_signal. */
4305 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
4307 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4308 if (!proc_kill (pi, SIGKILL))
4309 proc_error (pi, "unconditionally_kill, proc_kill", __LINE__);
4310 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4311 destroy_procinfo (pi);
4313 /* If pi is GDB's child, wait for it to die. */
4314 if (parent_pid == getpid ())
4315 /* FIXME: should we use waitpid to make sure we get the right event?
4316 Should we check the returned event? */
4321 ret = waitpid (pi->pid, &status, 0);
4328 /* We're done debugging it, and we want it to go away. Then we want
4329 GDB to forget all about it. */
4332 procfs_kill_inferior (struct target_ops *ops)
4334 if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */
4336 /* Find procinfo for main process. */
4337 procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0);
4340 unconditionally_kill_inferior (pi);
4341 target_mourn_inferior ();
4345 /* Forget we ever debugged this thing! */
4348 procfs_mourn_inferior (struct target_ops *ops)
4352 if (!ptid_equal (inferior_ptid, null_ptid))
4354 /* Find procinfo for main process. */
4355 pi = find_procinfo (ptid_get_pid (inferior_ptid), 0);
4357 destroy_procinfo (pi);
4359 unpush_target (ops);
4361 if (dbx_link_bpt != NULL)
4363 deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt);
4364 dbx_link_bpt_addr = 0;
4365 dbx_link_bpt = NULL;
4368 generic_mourn_inferior ();
4371 /* When GDB forks to create a runnable inferior process, this function
4372 is called on the parent side of the fork. It's job is to do
4373 whatever is necessary to make the child ready to be debugged, and
4374 then wait for the child to synchronize. */
4377 procfs_init_inferior (struct target_ops *ops, int pid)
4380 gdb_sigset_t signals;
4384 /* This routine called on the parent side (GDB side)
4385 after GDB forks the inferior. */
4388 if ((pi = create_procinfo (pid, 0)) == NULL)
4389 perror (_("procfs: out of memory in 'init_inferior'"));
4391 if (!open_procinfo_files (pi, FD_CTL))
4392 proc_error (pi, "init_inferior, open_proc_files", __LINE__);
4396 open_procinfo_files // done
4399 procfs_notice_signals
4406 /* If not stopped yet, wait for it to stop. */
4407 if (!(proc_flags (pi) & PR_STOPPED) &&
4408 !(proc_wait_for_stop (pi)))
4409 dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL);
4411 /* Save some of the /proc state to be restored if we detach. */
4412 /* FIXME: Why? In case another debugger was debugging it?
4413 We're it's parent, for Ghu's sake! */
4414 if (!proc_get_traced_signals (pi, &pi->saved_sigset))
4415 proc_error (pi, "init_inferior, get_traced_signals", __LINE__);
4416 if (!proc_get_held_signals (pi, &pi->saved_sighold))
4417 proc_error (pi, "init_inferior, get_held_signals", __LINE__);
4418 if (!proc_get_traced_faults (pi, &pi->saved_fltset))
4419 proc_error (pi, "init_inferior, get_traced_faults", __LINE__);
4420 if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
4421 proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__);
4422 if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
4423 proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__);
4425 if ((fail = procfs_debug_inferior (pi)) != 0)
4426 proc_error (pi, "init_inferior (procfs_debug_inferior)", fail);
4428 /* FIXME: logically, we should really be turning OFF run-on-last-close,
4429 and possibly even turning ON kill-on-last-close at this point. But
4430 I can't make that change without careful testing which I don't have
4431 time to do right now... */
4432 /* Turn on run-on-last-close flag so that the child
4433 will die if GDB goes away for some reason. */
4434 if (!proc_set_run_on_last_close (pi))
4435 proc_error (pi, "init_inferior, set_RLC", __LINE__);
4437 /* We now have have access to the lwpid of the main thread/lwp. */
4438 lwpid = proc_get_current_thread (pi);
4440 /* Create a procinfo for the main lwp. */
4441 create_procinfo (pid, lwpid);
4443 /* We already have a main thread registered in the thread table at
4444 this point, but it didn't have any lwp info yet. Notify the core
4445 about it. This changes inferior_ptid as well. */
4446 thread_change_ptid (pid_to_ptid (pid),
4447 ptid_build (pid, lwpid, 0));
4449 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
4452 /* On mips-irix, we need to stop the inferior early enough during
4453 the startup phase in order to be able to load the shared library
4454 symbols and insert the breakpoints that are located in these shared
4455 libraries. Stopping at the program entry point is not good enough
4456 because the -init code is executed before the execution reaches
4459 So what we need to do is to insert a breakpoint in the runtime
4460 loader (rld), more precisely in __dbx_link(). This procedure is
4461 called by rld once all shared libraries have been mapped, but before
4462 the -init code is executed. Unfortuantely, this is not straightforward,
4463 as rld is not part of the executable we are running, and thus we need
4464 the inferior to run until rld itself has been mapped in memory.
4466 For this, we trace all syssgi() syscall exit events. Each time
4467 we detect such an event, we iterate over each text memory maps,
4468 get its associated fd, and scan the symbol table for __dbx_link().
4469 When found, we know that rld has been mapped, and that we can insert
4470 the breakpoint at the symbol address. Once the dbx_link() breakpoint
4471 has been inserted, the syssgi() notifications are no longer necessary,
4472 so they should be canceled. */
4473 proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0);
4477 /* When GDB forks to create a new process, this function is called on
4478 the child side of the fork before GDB exec's the user program. Its
4479 job is to make the child minimally debuggable, so that the parent
4480 GDB process can connect to the child and take over. This function
4481 should do only the minimum to make that possible, and to
4482 synchronize with the parent process. The parent process should
4483 take care of the details. */
4486 procfs_set_exec_trap (void)
4488 /* This routine called on the child side (inferior side)
4489 after GDB forks the inferior. It must use only local variables,
4490 because it may be sharing data space with its parent. */
4495 if ((pi = create_procinfo (getpid (), 0)) == NULL)
4496 perror_with_name (_("procfs: create_procinfo failed in child."));
4498 if (open_procinfo_files (pi, FD_CTL) == 0)
4500 proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__);
4501 gdb_flush (gdb_stderr);
4502 /* No need to call "dead_procinfo", because we're going to
4507 #ifdef PRFS_STOPEXEC /* defined on OSF */
4508 /* OSF method for tracing exec syscalls. Quoting:
4509 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
4510 exits from exec system calls because of the user level loader. */
4511 /* FIXME: make nice and maybe move into an access function. */
4515 if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
4517 proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__);
4518 gdb_flush (gdb_stderr);
4521 prfs_flags |= PRFS_STOPEXEC;
4523 if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
4525 proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__);
4526 gdb_flush (gdb_stderr);
4530 #else /* not PRFS_STOPEXEC */
4531 /* Everyone else's (except OSF) method for tracing exec syscalls. */
4533 Not all systems with /proc have all the exec* syscalls with the same
4534 names. On the SGI, for example, there is no SYS_exec, but there
4535 *is* a SYS_execv. So, we try to account for that. */
4537 exitset = sysset_t_alloc (pi);
4538 gdb_premptysysset (exitset);
4540 gdb_praddsysset (exitset, SYS_exec);
4543 gdb_praddsysset (exitset, SYS_execve);
4546 gdb_praddsysset (exitset, SYS_execv);
4548 #ifdef DYNAMIC_SYSCALLS
4550 int callnum = find_syscall (pi, "execve");
4553 gdb_praddsysset (exitset, callnum);
4555 callnum = find_syscall (pi, "ra_execve");
4557 gdb_praddsysset (exitset, callnum);
4559 #endif /* DYNAMIC_SYSCALLS */
4561 if (!proc_set_traced_sysexit (pi, exitset))
4563 proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__);
4564 gdb_flush (gdb_stderr);
4567 #endif /* PRFS_STOPEXEC */
4569 /* FIXME: should this be done in the parent instead? */
4570 /* Turn off inherit on fork flag so that all grand-children
4571 of gdb start with tracing flags cleared. */
4572 if (!proc_unset_inherit_on_fork (pi))
4573 proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__);
4575 /* Turn off run on last close flag, so that the child process
4576 cannot run away just because we close our handle on it.
4577 We want it to wait for the parent to attach. */
4578 if (!proc_unset_run_on_last_close (pi))
4579 proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__);
4581 /* FIXME: No need to destroy the procinfo --
4582 we have our own address space, and we're about to do an exec! */
4583 /*destroy_procinfo (pi);*/
4586 /* This function is called BEFORE gdb forks the inferior process. Its
4587 only real responsibility is to set things up for the fork, and tell
4588 GDB which two functions to call after the fork (one for the parent,
4589 and one for the child).
4591 This function does a complicated search for a unix shell program,
4592 which it then uses to parse arguments and environment variables to
4593 be sent to the child. I wonder whether this code could not be
4594 abstracted out and shared with other unix targets such as
4598 procfs_create_inferior (struct target_ops *ops, char *exec_file,
4599 char *allargs, char **env, int from_tty)
4601 char *shell_file = getenv ("SHELL");
4605 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
4608 /* We will be looking down the PATH to find shell_file. If we
4609 just do this the normal way (via execlp, which operates by
4610 attempting an exec for each element of the PATH until it
4611 finds one which succeeds), then there will be an exec for
4612 each failed attempt, each of which will cause a PR_SYSEXIT
4613 stop, and we won't know how to distinguish the PR_SYSEXIT's
4614 for these failed execs with the ones for successful execs
4615 (whether the exec has succeeded is stored at that time in the
4616 carry bit or some such architecture-specific and
4617 non-ABI-specified place).
4619 So I can't think of anything better than to search the PATH
4620 now. This has several disadvantages: (1) There is a race
4621 condition; if we find a file now and it is deleted before we
4622 exec it, we lose, even if the deletion leaves a valid file
4623 further down in the PATH, (2) there is no way to know exactly
4624 what an executable (in the sense of "capable of being
4625 exec'd") file is. Using access() loses because it may lose
4626 if the caller is the superuser; failing to use it loses if
4627 there are ACLs or some such. */
4631 /* FIXME-maybe: might want "set path" command so user can change what
4632 path is used from within GDB. */
4633 char *path = getenv ("PATH");
4635 struct stat statbuf;
4638 path = "/bin:/usr/bin";
4640 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
4641 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
4643 p1 = strchr (p, ':');
4648 strncpy (tryname, p, len);
4649 tryname[len] = '\0';
4650 strcat (tryname, "/");
4651 strcat (tryname, shell_file);
4652 if (access (tryname, X_OK) < 0)
4654 if (stat (tryname, &statbuf) < 0)
4656 if (!S_ISREG (statbuf.st_mode))
4657 /* We certainly need to reject directories. I'm not quite
4658 as sure about FIFOs, sockets, etc., but I kind of doubt
4659 that people want to exec() these things. */
4664 /* Not found. This must be an error rather than merely passing
4665 the file to execlp(), because execlp() would try all the
4666 exec()s, causing GDB to get confused. */
4667 error (_("procfs:%d -- Can't find shell %s in PATH"),
4668 __LINE__, shell_file);
4670 shell_file = tryname;
4673 pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap,
4674 NULL, NULL, shell_file, NULL);
4676 procfs_init_inferior (ops, pid);
4679 /* An observer for the "inferior_created" event. */
4682 procfs_inferior_created (struct target_ops *ops, int from_tty)
4685 /* Make sure to cancel the syssgi() syscall-exit notifications.
4686 They should normally have been removed by now, but they may still
4687 be activated if the inferior doesn't use shared libraries, or if
4688 we didn't locate __dbx_link, or if we never stopped in __dbx_link.
4689 See procfs_init_inferior() for more details.
4691 Since these notifications are only ever enabled when we spawned
4692 the inferior ourselves, there is nothing to do when the inferior
4693 was created by attaching to an already running process, or when
4694 debugging a core file. */
4695 if (current_inferior ()->attach_flag || !target_can_run (¤t_target))
4698 proc_trace_syscalls_1 (find_procinfo_or_die (ptid_get_pid (inferior_ptid),
4699 0), SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0);
4703 /* Callback for find_new_threads. Calls "add_thread". */
4706 procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr)
4708 ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0);
4710 if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid))
4711 add_thread (gdb_threadid);
4716 /* Query all the threads that the target knows about, and give them
4717 back to GDB to add to its list. */
4720 procfs_find_new_threads (struct target_ops *ops)
4724 /* Find procinfo for main process. */
4725 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4726 proc_update_threads (pi);
4727 proc_iterate_over_threads (pi, procfs_notice_thread, NULL);
4730 /* Return true if the thread is still 'alive'. This guy doesn't
4731 really seem to be doing his job. Got to investigate how to tell
4732 when a thread is really gone. */
4735 procfs_thread_alive (struct target_ops *ops, ptid_t ptid)
4740 proc = ptid_get_pid (ptid);
4741 thread = ptid_get_lwp (ptid);
4742 /* If I don't know it, it ain't alive! */
4743 if ((pi = find_procinfo (proc, thread)) == NULL)
4746 /* If I can't get its status, it ain't alive!
4747 What's more, I need to forget about it! */
4748 if (!proc_get_status (pi))
4750 destroy_procinfo (pi);
4753 /* I couldn't have got its status if it weren't alive, so it's
4758 /* Convert PTID to a string. Returns the string in a static
4762 procfs_pid_to_str (struct target_ops *ops, ptid_t ptid)
4764 static char buf[80];
4766 if (ptid_get_lwp (ptid) == 0)
4767 sprintf (buf, "process %d", ptid_get_pid (ptid));
4769 sprintf (buf, "LWP %ld", ptid_get_lwp (ptid));
4774 /* Insert a watchpoint. */
4777 procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag,
4784 pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ?
4785 ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid),
4788 /* Translate from GDB's flags to /proc's. */
4789 if (len > 0) /* len == 0 means delete watchpoint. */
4791 switch (rwflag) { /* FIXME: need an enum! */
4792 case hw_write: /* default watchpoint (write) */
4793 pflags = WRITE_WATCHFLAG;
4795 case hw_read: /* read watchpoint */
4796 pflags = READ_WATCHFLAG;
4798 case hw_access: /* access watchpoint */
4799 pflags = READ_WATCHFLAG | WRITE_WATCHFLAG;
4801 case hw_execute: /* execution HW breakpoint */
4802 pflags = EXEC_WATCHFLAG;
4804 default: /* Something weird. Return error. */
4807 if (after) /* Stop after r/w access is completed. */
4808 pflags |= AFTER_WATCHFLAG;
4811 if (!proc_set_watchpoint (pi, addr, len, pflags))
4813 if (errno == E2BIG) /* Typical error for no resources. */
4814 return -1; /* fail */
4815 /* GDB may try to remove the same watchpoint twice.
4816 If a remove request returns no match, don't error. */
4817 if (errno == ESRCH && len == 0)
4818 return 0; /* ignore */
4819 proc_error (pi, "set_watchpoint", __LINE__);
4825 /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE
4826 is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint,
4827 or bp_hardware_watchpoint. CNT is the number of watchpoints used so
4830 Note: procfs_can_use_hw_breakpoint() is not yet used by all
4831 procfs.c targets due to the fact that some of them still define
4832 target_can_use_hardware_watchpoint. */
4835 procfs_can_use_hw_breakpoint (int type, int cnt, int othertype)
4837 /* Due to the way that proc_set_watchpoint() is implemented, host
4838 and target pointers must be of the same size. If they are not,
4839 we can't use hardware watchpoints. This limitation is due to the
4840 fact that proc_set_watchpoint() calls
4841 procfs_address_to_host_pointer(); a close inspection of
4842 procfs_address_to_host_pointer will reveal that an internal error
4843 will be generated when the host and target pointer sizes are
4845 struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
4847 if (sizeof (void *) != TYPE_LENGTH (ptr_type))
4850 /* Other tests here??? */
4855 /* Returns non-zero if process is stopped on a hardware watchpoint
4856 fault, else returns zero. */
4859 procfs_stopped_by_watchpoint (void)
4863 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4865 if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
4867 if (proc_why (pi) == PR_FAULTED)
4870 if (proc_what (pi) == FLTWATCH)
4874 if (proc_what (pi) == FLTKWATCH)
4882 /* Returns 1 if the OS knows the position of the triggered watchpoint,
4883 and sets *ADDR to that address. Returns 0 if OS cannot report that
4884 address. This function is only called if
4885 procfs_stopped_by_watchpoint returned 1, thus no further checks are
4886 done. The function also assumes that ADDR is not NULL. */
4889 procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr)
4893 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4894 return proc_watchpoint_address (pi, addr);
4898 procfs_insert_watchpoint (CORE_ADDR addr, int len, int type,
4899 struct expression *cond)
4901 if (!target_have_steppable_watchpoint
4902 && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ()))
4904 /* When a hardware watchpoint fires off the PC will be left at
4905 the instruction following the one which caused the
4906 watchpoint. It will *NOT* be necessary for GDB to step over
4908 return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1);
4912 /* When a hardware watchpoint fires off the PC will be left at
4913 the instruction which caused the watchpoint. It will be
4914 necessary for GDB to step over the watchpoint. */
4915 return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0);
4920 procfs_remove_watchpoint (CORE_ADDR addr, int len, int type,
4921 struct expression *cond)
4923 return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0);
4927 procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
4929 /* The man page for proc(4) on Solaris 2.6 and up says that the
4930 system can support "thousands" of hardware watchpoints, but gives
4931 no method for finding out how many; It doesn't say anything about
4932 the allowed size for the watched area either. So we just tell
4938 procfs_use_watchpoints (struct target_ops *t)
4940 t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint;
4941 t->to_insert_watchpoint = procfs_insert_watchpoint;
4942 t->to_remove_watchpoint = procfs_remove_watchpoint;
4943 t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint;
4944 t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint;
4945 t->to_stopped_data_address = procfs_stopped_data_address;
4948 /* Memory Mappings Functions: */
4950 /* Call a callback function once for each mapping, passing it the
4951 mapping, an optional secondary callback function, and some optional
4952 opaque data. Quit and return the first non-zero value returned
4955 PI is the procinfo struct for the process to be mapped. FUNC is
4956 the callback function to be called by this iterator. DATA is the
4957 optional opaque data to be passed to the callback function.
4958 CHILD_FUNC is the optional secondary function pointer to be passed
4959 to the child function. Returns the first non-zero return value
4960 from the callback function, or zero. */
4963 iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func,
4965 int (*func) (struct prmap *map,
4966 find_memory_region_ftype child_func,
4969 char pathname[MAX_PROC_NAME_SIZE];
4970 struct prmap *prmaps;
4971 struct prmap *prmap;
4975 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
4980 /* Get the number of mappings, allocate space,
4981 and read the mappings into prmaps. */
4984 sprintf (pathname, "/proc/%d/map", pi->pid);
4985 if ((map_fd = open (pathname, O_RDONLY)) < 0)
4986 proc_error (pi, "iterate_over_mappings (open)", __LINE__);
4988 /* Make sure it gets closed again. */
4989 make_cleanup_close (map_fd);
4991 /* Use stat to determine the file size, and compute
4992 the number of prmap_t objects it contains. */
4993 if (fstat (map_fd, &sbuf) != 0)
4994 proc_error (pi, "iterate_over_mappings (fstat)", __LINE__);
4996 nmap = sbuf.st_size / sizeof (prmap_t);
4997 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4998 if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps))
4999 != (nmap * sizeof (*prmaps)))
5000 proc_error (pi, "iterate_over_mappings (read)", __LINE__);
5002 /* Use ioctl command PIOCNMAP to get number of mappings. */
5003 if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0)
5004 proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__);
5006 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
5007 if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0)
5008 proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__);
5011 for (prmap = prmaps; nmap > 0; prmap++, nmap--)
5012 if ((funcstat = (*func) (prmap, child_func, data)) != 0)
5014 do_cleanups (cleanups);
5018 do_cleanups (cleanups);
5022 /* Implements the to_find_memory_regions method. Calls an external
5023 function for each memory region.
5024 Returns the integer value returned by the callback. */
5027 find_memory_regions_callback (struct prmap *map,
5028 find_memory_region_ftype func, void *data)
5030 return (*func) ((CORE_ADDR) map->pr_vaddr,
5032 (map->pr_mflags & MA_READ) != 0,
5033 (map->pr_mflags & MA_WRITE) != 0,
5034 (map->pr_mflags & MA_EXEC) != 0,
5035 1, /* MODIFIED is unknown, pass it as true. */
5039 /* External interface. Calls a callback function once for each
5040 mapped memory region in the child process, passing as arguments:
5042 CORE_ADDR virtual_address,
5044 int read, TRUE if region is readable by the child
5045 int write, TRUE if region is writable by the child
5046 int execute TRUE if region is executable by the child.
5048 Stops iterating and returns the first non-zero value returned by
5052 proc_find_memory_regions (find_memory_region_ftype func, void *data)
5054 procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
5056 return iterate_over_mappings (pi, func, data,
5057 find_memory_regions_callback);
5060 /* Returns an ascii representation of a memory mapping's flags. */
5063 mappingflags (long flags)
5065 static char asciiflags[8];
5067 strcpy (asciiflags, "-------");
5068 #if defined (MA_PHYS)
5069 if (flags & MA_PHYS)
5070 asciiflags[0] = 'd';
5072 if (flags & MA_STACK)
5073 asciiflags[1] = 's';
5074 if (flags & MA_BREAK)
5075 asciiflags[2] = 'b';
5076 if (flags & MA_SHARED)
5077 asciiflags[3] = 's';
5078 if (flags & MA_READ)
5079 asciiflags[4] = 'r';
5080 if (flags & MA_WRITE)
5081 asciiflags[5] = 'w';
5082 if (flags & MA_EXEC)
5083 asciiflags[6] = 'x';
5084 return (asciiflags);
5087 /* Callback function, does the actual work for 'info proc
5091 info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore,
5094 unsigned int pr_off;
5096 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
5097 pr_off = (unsigned int) map->pr_offset;
5099 pr_off = map->pr_off;
5102 if (gdbarch_addr_bit (target_gdbarch ()) == 32)
5103 printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n",
5104 (unsigned long) map->pr_vaddr,
5105 (unsigned long) map->pr_vaddr + map->pr_size - 1,
5106 (unsigned long) map->pr_size,
5108 mappingflags (map->pr_mflags));
5110 printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n",
5111 (unsigned long) map->pr_vaddr,
5112 (unsigned long) map->pr_vaddr + map->pr_size - 1,
5113 (unsigned long) map->pr_size,
5115 mappingflags (map->pr_mflags));
5120 /* Implement the "info proc mappings" subcommand. */
5123 info_proc_mappings (procinfo *pi, int summary)
5126 return; /* No output for summary mode. */
5128 printf_filtered (_("Mapped address spaces:\n\n"));
5129 if (gdbarch_ptr_bit (target_gdbarch ()) == 32)
5130 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
5137 printf_filtered (" %18s %18s %10s %10s %7s\n",
5144 iterate_over_mappings (pi, NULL, NULL, info_mappings_callback);
5145 printf_filtered ("\n");
5148 /* Implement the "info proc" command. */
5151 procfs_info_proc (struct target_ops *ops, char *args,
5152 enum info_proc_what what)
5154 struct cleanup *old_chain;
5155 procinfo *process = NULL;
5156 procinfo *thread = NULL;
5174 error (_("Not supported on this target."));
5177 old_chain = make_cleanup (null_cleanup, 0);
5180 argv = gdb_buildargv (args);
5181 make_cleanup_freeargv (argv);
5183 while (argv != NULL && *argv != NULL)
5185 if (isdigit (argv[0][0]))
5187 pid = strtoul (argv[0], &tmp, 10);
5189 tid = strtoul (++tmp, NULL, 10);
5191 else if (argv[0][0] == '/')
5193 tid = strtoul (argv[0] + 1, NULL, 10);
5198 pid = ptid_get_pid (inferior_ptid);
5200 error (_("No current process: you must name one."));
5203 /* Have pid, will travel.
5204 First see if it's a process we're already debugging. */
5205 process = find_procinfo (pid, 0);
5206 if (process == NULL)
5208 /* No. So open a procinfo for it, but
5209 remember to close it again when finished. */
5210 process = create_procinfo (pid, 0);
5211 make_cleanup (do_destroy_procinfo_cleanup, process);
5212 if (!open_procinfo_files (process, FD_CTL))
5213 proc_error (process, "info proc, open_procinfo_files", __LINE__);
5217 thread = create_procinfo (pid, tid);
5221 printf_filtered (_("process %d flags:\n"), process->pid);
5222 proc_prettyprint_flags (proc_flags (process), 1);
5223 if (proc_flags (process) & (PR_STOPPED | PR_ISTOP))
5224 proc_prettyprint_why (proc_why (process), proc_what (process), 1);
5225 if (proc_get_nthreads (process) > 1)
5226 printf_filtered ("Process has %d threads.\n",
5227 proc_get_nthreads (process));
5231 printf_filtered (_("thread %d flags:\n"), thread->tid);
5232 proc_prettyprint_flags (proc_flags (thread), 1);
5233 if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP))
5234 proc_prettyprint_why (proc_why (thread), proc_what (thread), 1);
5239 info_proc_mappings (process, 0);
5242 do_cleanups (old_chain);
5245 /* Modify the status of the system call identified by SYSCALLNUM in
5246 the set of syscalls that are currently traced/debugged.
5248 If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set
5249 will be updated. Otherwise, the exit syscalls set will be updated.
5251 If MODE is FLAG_SET, then traces will be enabled. Otherwise, they
5252 will be disabled. */
5255 proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit,
5256 int mode, int from_tty)
5260 if (entry_or_exit == PR_SYSENTRY)
5261 sysset = proc_get_traced_sysentry (pi, NULL);
5263 sysset = proc_get_traced_sysexit (pi, NULL);
5266 proc_error (pi, "proc-trace, get_traced_sysset", __LINE__);
5268 if (mode == FLAG_SET)
5269 gdb_praddsysset (sysset, syscallnum);
5271 gdb_prdelsysset (sysset, syscallnum);
5273 if (entry_or_exit == PR_SYSENTRY)
5275 if (!proc_set_traced_sysentry (pi, sysset))
5276 proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__);
5280 if (!proc_set_traced_sysexit (pi, sysset))
5281 proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__);
5286 proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode)
5290 if (ptid_get_pid (inferior_ptid) <= 0)
5291 error (_("you must be debugging a process to use this command."));
5293 if (args == NULL || args[0] == 0)
5294 error_no_arg (_("system call to trace"));
5296 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
5297 if (isdigit (args[0]))
5299 const int syscallnum = atoi (args);
5301 proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty);
5306 proc_trace_sysentry_cmd (char *args, int from_tty)
5308 proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET);
5312 proc_trace_sysexit_cmd (char *args, int from_tty)
5314 proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET);
5318 proc_untrace_sysentry_cmd (char *args, int from_tty)
5320 proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET);
5324 proc_untrace_sysexit_cmd (char *args, int from_tty)
5326 proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET);
5330 /* Provide a prototype to silence -Wmissing-prototypes. */
5331 extern void _initialize_procfs (void);
5334 _initialize_procfs (void)
5336 observer_attach_inferior_created (procfs_inferior_created);
5338 add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd,
5339 _("Give a trace of entries into the syscall."));
5340 add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd,
5341 _("Give a trace of exits from the syscall."));
5342 add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd,
5343 _("Cancel a trace of entries into the syscall."));
5344 add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd,
5345 _("Cancel a trace of exits from the syscall."));
5348 /* =================== END, GDB "MODULE" =================== */
5352 /* miscellaneous stubs: */
5354 /* The following satisfy a few random symbols mostly created by the
5355 solaris threads implementation, which I will chase down later. */
5357 /* Return a pid for which we guarantee we will be able to find a
5361 procfs_first_available (void)
5363 return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1);
5366 /* =================== GCORE .NOTE "MODULE" =================== */
5367 #if defined (PIOCOPENLWP) || defined (PCAGENT)
5368 /* gcore only implemented on solaris (so far) */
5371 procfs_do_thread_registers (bfd *obfd, ptid_t ptid,
5372 char *note_data, int *note_size,
5373 enum gdb_signal stop_signal)
5375 struct regcache *regcache = get_thread_regcache (ptid);
5376 gdb_gregset_t gregs;
5377 gdb_fpregset_t fpregs;
5378 unsigned long merged_pid;
5379 struct cleanup *old_chain;
5381 merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid);
5383 /* This part is the old method for fetching registers.
5384 It should be replaced by the newer one using regsets
5385 once it is implemented in this platform:
5386 gdbarch_regset_from_core_section() and regset->collect_regset(). */
5388 old_chain = save_inferior_ptid ();
5389 inferior_ptid = ptid;
5390 target_fetch_registers (regcache, -1);
5392 fill_gregset (regcache, &gregs, -1);
5393 #if defined (NEW_PROC_API)
5394 note_data = (char *) elfcore_write_lwpstatus (obfd,
5401 note_data = (char *) elfcore_write_prstatus (obfd,
5408 fill_fpregset (regcache, &fpregs, -1);
5409 note_data = (char *) elfcore_write_prfpreg (obfd,
5415 do_cleanups (old_chain);
5420 struct procfs_corefile_thread_data {
5424 enum gdb_signal stop_signal;
5428 procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data)
5430 struct procfs_corefile_thread_data *args = data;
5434 ptid_t ptid = ptid_build (pi->pid, thread->tid, 0);
5436 args->note_data = procfs_do_thread_registers (args->obfd, ptid,
5445 find_signalled_thread (struct thread_info *info, void *data)
5447 if (info->suspend.stop_signal != GDB_SIGNAL_0
5448 && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
5454 static enum gdb_signal
5455 find_stop_signal (void)
5457 struct thread_info *info =
5458 iterate_over_threads (find_signalled_thread, NULL);
5461 return info->suspend.stop_signal;
5463 return GDB_SIGNAL_0;
5467 procfs_make_note_section (bfd *obfd, int *note_size)
5469 struct cleanup *old_chain;
5470 gdb_gregset_t gregs;
5471 gdb_fpregset_t fpregs;
5472 char fname[16] = {'\0'};
5473 char psargs[80] = {'\0'};
5474 procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
5475 char *note_data = NULL;
5477 struct procfs_corefile_thread_data thread_args;
5480 enum gdb_signal stop_signal;
5482 if (get_exec_file (0))
5484 strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname));
5485 fname[sizeof (fname) - 1] = 0;
5486 strncpy (psargs, get_exec_file (0), sizeof (psargs));
5487 psargs[sizeof (psargs) - 1] = 0;
5489 inf_args = get_inferior_args ();
5490 if (inf_args && *inf_args &&
5491 strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs)))
5493 strncat (psargs, " ",
5494 sizeof (psargs) - strlen (psargs));
5495 strncat (psargs, inf_args,
5496 sizeof (psargs) - strlen (psargs));
5500 note_data = (char *) elfcore_write_prpsinfo (obfd,
5506 stop_signal = find_stop_signal ();
5509 fill_gregset (get_current_regcache (), &gregs, -1);
5510 note_data = elfcore_write_pstatus (obfd, note_data, note_size,
5511 ptid_get_pid (inferior_ptid),
5512 stop_signal, &gregs);
5515 thread_args.obfd = obfd;
5516 thread_args.note_data = note_data;
5517 thread_args.note_size = note_size;
5518 thread_args.stop_signal = stop_signal;
5519 proc_iterate_over_threads (pi, procfs_corefile_thread_callback,
5522 /* There should be always at least one thread. */
5523 gdb_assert (thread_args.note_data != note_data);
5524 note_data = thread_args.note_data;
5526 auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV,
5530 note_data = elfcore_write_note (obfd, note_data, note_size,
5531 "CORE", NT_AUXV, auxv, auxv_len);
5535 make_cleanup (xfree, note_data);
5538 #else /* !Solaris */
5540 procfs_make_note_section (bfd *obfd, int *note_size)
5542 error (_("gcore not implemented for this host."));
5543 return NULL; /* lint */
5545 #endif /* Solaris */
5546 /* =================== END GCORE .NOTE "MODULE" =================== */