1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
3 Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007, 2008, 2009, 2010,
4 2011 Free Software Foundation, Inc.
6 Written by Michael Snyder at Cygnus Solutions.
7 Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 #include "elf-bfd.h" /* for elfcore_write_* */
30 #include "gdbthread.h"
32 #include "inf-child.h"
34 #if defined (NEW_PROC_API)
35 #define _STRUCTURED_PROC 1 /* Should be done by configure script. */
38 #include <sys/procfs.h>
39 #ifdef HAVE_SYS_FAULT_H
40 #include <sys/fault.h>
42 #ifdef HAVE_SYS_SYSCALL_H
43 #include <sys/syscall.h>
45 #include <sys/errno.h>
49 #include "gdb_string.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:
68 /proc works by imitating a file system: you open a simulated file
69 that represents the process you wish to interact with, and perform
70 operations on that "file" in order to examine or change the state
73 The most important thing to know about /proc and this module is
74 that there are two very different interfaces to /proc:
76 One that uses the ioctl system call, and another that uses read
77 and write system calls.
79 This module has to support both /proc interfaces. This means that
80 there are two different ways of doing every basic operation.
82 In order to keep most of the code simple and clean, I have defined
83 an interface "layer" which hides all these system calls. An ifdef
84 (NEW_PROC_API) determines which interface we are using, and most or
85 all occurrances of this ifdef should be confined to this interface
88 /* Determine which /proc API we are using: The ioctl API defines
89 PIOCSTATUS, while the read/write (multiple fd) API never does. */
92 #include <sys/types.h>
93 #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */
96 #include <fcntl.h> /* for O_RDONLY */
97 #include <unistd.h> /* for "X_OK" */
98 #include "gdb_stat.h" /* for struct stat */
100 /* Note: procfs-utils.h must be included after the above system header
101 files, because it redefines various system calls using macros.
102 This may be incompatible with the prototype declarations. */
104 #include "proc-utils.h"
106 /* Prototypes for supply_gregset etc. */
109 /* =================== TARGET_OPS "MODULE" =================== */
111 /* This module defines the GDB target vector and its methods. */
113 static void procfs_attach (struct target_ops *, char *, int);
114 static void procfs_detach (struct target_ops *, char *, int);
115 static void procfs_resume (struct target_ops *,
116 ptid_t, int, enum target_signal);
117 static void procfs_stop (ptid_t);
118 static void procfs_files_info (struct target_ops *);
119 static void procfs_fetch_registers (struct target_ops *,
120 struct regcache *, int);
121 static void procfs_store_registers (struct target_ops *,
122 struct regcache *, int);
123 static void procfs_pass_signals (int, unsigned char *);
124 static void procfs_kill_inferior (struct target_ops *ops);
125 static void procfs_mourn_inferior (struct target_ops *ops);
126 static void procfs_create_inferior (struct target_ops *, char *,
127 char *, char **, int);
128 static ptid_t procfs_wait (struct target_ops *,
129 ptid_t, struct target_waitstatus *, int);
130 static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int,
131 struct mem_attrib *attrib,
132 struct target_ops *);
133 static LONGEST procfs_xfer_partial (struct target_ops *ops,
134 enum target_object object,
137 const gdb_byte *writebuf,
138 ULONGEST offset, LONGEST len);
140 static int procfs_thread_alive (struct target_ops *ops, ptid_t);
142 void procfs_find_new_threads (struct target_ops *ops);
143 char *procfs_pid_to_str (struct target_ops *, ptid_t);
145 static int proc_find_memory_regions (int (*) (CORE_ADDR,
151 static char * procfs_make_note_section (bfd *, int *);
153 static int procfs_can_use_hw_breakpoint (int, int, int);
155 #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64)
156 /* When GDB is built as 64-bit application on Solaris, the auxv data
157 is presented in 64-bit format. We need to provide a custom parser
160 procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
161 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
163 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
164 gdb_byte *ptr = *readptr;
169 if (endptr - ptr < 8 * 2)
172 *typep = extract_unsigned_integer (ptr, 4, byte_order);
174 /* The size of data is always 64-bit. If the application is 32-bit,
175 it will be zero extended, as expected. */
176 *valp = extract_unsigned_integer (ptr, 8, byte_order);
187 struct target_ops *t = inf_child_target ();
189 t->to_shortname = "procfs";
190 t->to_longname = "Unix /proc child process";
192 "Unix /proc child process (started by the \"run\" command).";
193 t->to_create_inferior = procfs_create_inferior;
194 t->to_kill = procfs_kill_inferior;
195 t->to_mourn_inferior = procfs_mourn_inferior;
196 t->to_attach = procfs_attach;
197 t->to_detach = procfs_detach;
198 t->to_wait = procfs_wait;
199 t->to_resume = procfs_resume;
200 t->to_fetch_registers = procfs_fetch_registers;
201 t->to_store_registers = procfs_store_registers;
202 t->to_xfer_partial = procfs_xfer_partial;
203 t->deprecated_xfer_memory = procfs_xfer_memory;
204 t->to_pass_signals = procfs_pass_signals;
205 t->to_files_info = procfs_files_info;
206 t->to_stop = procfs_stop;
208 t->to_find_new_threads = procfs_find_new_threads;
209 t->to_thread_alive = procfs_thread_alive;
210 t->to_pid_to_str = procfs_pid_to_str;
212 t->to_has_thread_control = tc_schedlock;
213 t->to_find_memory_regions = proc_find_memory_regions;
214 t->to_make_corefile_notes = procfs_make_note_section;
216 #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64)
217 t->to_auxv_parse = procfs_auxv_parse;
220 t->to_magic = OPS_MAGIC;
225 /* =================== END, TARGET_OPS "MODULE" =================== */
227 /* World Unification:
229 Put any typedefs, defines etc. here that are required for the
230 unification of code that handles different versions of /proc. */
232 #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */
234 enum { READ_WATCHFLAG = WA_READ,
235 WRITE_WATCHFLAG = WA_WRITE,
236 EXEC_WATCHFLAG = WA_EXEC,
237 AFTER_WATCHFLAG = WA_TRAPAFTER
240 #else /* Irix method for watchpoints */
241 enum { READ_WATCHFLAG = MA_READ,
242 WRITE_WATCHFLAG = MA_WRITE,
243 EXEC_WATCHFLAG = MA_EXEC,
244 AFTER_WATCHFLAG = 0 /* trapafter not implemented */
249 #ifdef HAVE_PR_SIGSET_T
250 typedef pr_sigset_t gdb_sigset_t;
252 typedef sigset_t gdb_sigset_t;
256 #ifdef HAVE_PR_SIGACTION64_T
257 typedef pr_sigaction64_t gdb_sigaction_t;
259 typedef struct sigaction gdb_sigaction_t;
263 #ifdef HAVE_PR_SIGINFO64_T
264 typedef pr_siginfo64_t gdb_siginfo_t;
266 typedef struct siginfo gdb_siginfo_t;
269 /* On mips-irix, praddset and prdelset are defined in such a way that
270 they return a value, which causes GCC to emit a -Wunused error
271 because the returned value is not used. Prevent this warning
272 by casting the return value to void. On sparc-solaris, this issue
273 does not exist because the definition of these macros already include
274 that cast to void. */
275 #define gdb_praddset(sp, flag) ((void) praddset (sp, flag))
276 #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag))
278 /* gdb_premptysysset */
280 #define gdb_premptysysset premptysysset
282 #define gdb_premptysysset premptyset
287 #define gdb_praddsysset praddsysset
289 #define gdb_praddsysset gdb_praddset
294 #define gdb_prdelsysset prdelsysset
296 #define gdb_prdelsysset gdb_prdelset
299 /* prissyssetmember */
300 #ifdef prissyssetmember
301 #define gdb_pr_issyssetmember prissyssetmember
303 #define gdb_pr_issyssetmember prismember
306 /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't
307 as intuitively descriptive as it could be, so we'll define
308 DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of
309 this writing, this feature is only found on AIX5 systems and
310 basically means that the set of syscalls is not fixed. I.e,
311 there's no nice table that one can #include to get all of the
312 syscall numbers. Instead, they're stored in /proc/PID/sysent
313 for each process. We are at least guaranteed that they won't
314 change over the lifetime of the process. But each process could
315 (in theory) have different syscall numbers. */
316 #ifdef HAVE_PRSYSENT_T
317 #define DYNAMIC_SYSCALLS
322 /* =================== STRUCT PROCINFO "MODULE" =================== */
324 /* FIXME: this comment will soon be out of date W.R.T. threads. */
326 /* The procinfo struct is a wrapper to hold all the state information
327 concerning a /proc process. There should be exactly one procinfo
328 for each process, and since GDB currently can debug only one
329 process at a time, that means there should be only one procinfo.
330 All of the LWP's of a process can be accessed indirectly thru the
331 single process procinfo.
333 However, against the day when GDB may debug more than one process,
334 this data structure is kept in a list (which for now will hold no
335 more than one member), and many functions will have a pointer to a
336 procinfo as an argument.
338 There will be a separate procinfo structure for use by the (not yet
339 implemented) "info proc" command, so that we can print useful
340 information about any random process without interfering with the
341 inferior's procinfo information. */
344 /* format strings for /proc paths */
345 # ifndef CTL_PROC_NAME_FMT
346 # define MAIN_PROC_NAME_FMT "/proc/%d"
347 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
348 # define AS_PROC_NAME_FMT "/proc/%d/as"
349 # define MAP_PROC_NAME_FMT "/proc/%d/map"
350 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
351 # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus")
353 /* the name of the proc status struct depends on the implementation */
354 typedef pstatus_t gdb_prstatus_t;
355 typedef lwpstatus_t gdb_lwpstatus_t;
356 #else /* ! NEW_PROC_API */
357 /* format strings for /proc paths */
358 # ifndef CTL_PROC_NAME_FMT
359 # define MAIN_PROC_NAME_FMT "/proc/%05d"
360 # define CTL_PROC_NAME_FMT "/proc/%05d"
361 # define AS_PROC_NAME_FMT "/proc/%05d"
362 # define MAP_PROC_NAME_FMT "/proc/%05d"
363 # define STATUS_PROC_NAME_FMT "/proc/%05d"
364 # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp")
366 /* The name of the proc status struct depends on the implementation. */
367 typedef prstatus_t gdb_prstatus_t;
368 typedef prstatus_t gdb_lwpstatus_t;
369 #endif /* NEW_PROC_API */
371 typedef struct procinfo {
372 struct procinfo *next;
373 int pid; /* Process ID */
374 int tid; /* Thread/LWP id */
378 int ignore_next_sigstop;
380 /* The following four fd fields may be identical, or may contain
381 several different fd's, depending on the version of /proc
382 (old ioctl or new read/write). */
384 int ctl_fd; /* File descriptor for /proc control file */
386 /* The next three file descriptors are actually only needed in the
387 read/write, multiple-file-descriptor implemenation
388 (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the
389 code, we will use them uniformly by (in the case of the ioctl
390 single-file-descriptor implementation) filling them with copies
391 of the control fd. */
392 int status_fd; /* File descriptor for /proc status file */
393 int as_fd; /* File descriptor for /proc as file */
395 char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */
397 fltset_t saved_fltset; /* Saved traced hardware fault set */
398 gdb_sigset_t saved_sigset; /* Saved traced signal set */
399 gdb_sigset_t saved_sighold; /* Saved held signal set */
400 sysset_t *saved_exitset; /* Saved traced system call exit set */
401 sysset_t *saved_entryset; /* Saved traced system call entry set */
403 gdb_prstatus_t prstatus; /* Current process status info */
406 gdb_fpregset_t fpregset; /* Current floating point registers */
409 #ifdef DYNAMIC_SYSCALLS
410 int num_syscalls; /* Total number of syscalls */
411 char **syscall_names; /* Syscall number to name map */
414 struct procinfo *thread_list;
416 int status_valid : 1;
418 int fpregs_valid : 1;
419 int threads_valid: 1;
422 static char errmsg[128]; /* shared error msg buffer */
424 /* Function prototypes for procinfo module: */
426 static procinfo *find_procinfo_or_die (int pid, int tid);
427 static procinfo *find_procinfo (int pid, int tid);
428 static procinfo *create_procinfo (int pid, int tid);
429 static void destroy_procinfo (procinfo * p);
430 static void do_destroy_procinfo_cleanup (void *);
431 static void dead_procinfo (procinfo * p, char *msg, int killp);
432 static int open_procinfo_files (procinfo * p, int which);
433 static void close_procinfo_files (procinfo * p);
434 static int sysset_t_size (procinfo *p);
435 static sysset_t *sysset_t_alloc (procinfo * pi);
436 #ifdef DYNAMIC_SYSCALLS
437 static void load_syscalls (procinfo *pi);
438 static void free_syscalls (procinfo *pi);
439 static int find_syscall (procinfo *pi, char *name);
440 #endif /* DYNAMIC_SYSCALLS */
442 static int iterate_over_mappings
443 (procinfo *pi, find_memory_region_ftype child_func, void *data,
444 int (*func) (struct prmap *map, find_memory_region_ftype child_func,
447 /* The head of the procinfo list: */
448 static procinfo * procinfo_list;
450 /* Search the procinfo list. Return a pointer to procinfo, or NULL if
454 find_procinfo (int pid, int tid)
458 for (pi = procinfo_list; pi; pi = pi->next)
465 /* Don't check threads_valid. If we're updating the
466 thread_list, we want to find whatever threads are already
467 here. This means that in general it is the caller's
468 responsibility to check threads_valid and update before
469 calling find_procinfo, if the caller wants to find a new
472 for (pi = pi->thread_list; pi; pi = pi->next)
480 /* Calls find_procinfo, but errors on failure. */
483 find_procinfo_or_die (int pid, int tid)
485 procinfo *pi = find_procinfo (pid, tid);
490 error (_("procfs: couldn't find pid %d "
491 "(kernel thread %d) in procinfo list."),
494 error (_("procfs: couldn't find pid %d in procinfo list."), pid);
499 /* Wrapper for `open'. The appropriate open call is attempted; if
500 unsuccessful, it will be retried as many times as needed for the
501 EAGAIN and EINTR conditions.
503 For other conditions, retry the open a limited number of times. In
504 addition, a short sleep is imposed prior to retrying the open. The
505 reason for this sleep is to give the kernel a chance to catch up
506 and create the file in question in the event that GDB "wins" the
507 race to open a file before the kernel has created it. */
510 open_with_retry (const char *pathname, int flags)
512 int retries_remaining, status;
514 retries_remaining = 2;
518 status = open (pathname, flags);
520 if (status >= 0 || retries_remaining == 0)
522 else if (errno != EINTR && errno != EAGAIN)
532 /* Open the file descriptor for the process or LWP. If NEW_PROC_API
533 is defined, we only open the control file descriptor; the others
534 are opened lazily as needed. Otherwise (if not NEW_PROC_API),
535 there is only one real file descriptor, but we keep multiple copies
536 of it so that the code that uses them does not have to be #ifdef'd.
537 Returns the file descriptor, or zero for failure. */
539 enum { FD_CTL, FD_STATUS, FD_AS };
542 open_procinfo_files (procinfo *pi, int which)
545 char tmp[MAX_PROC_NAME_SIZE];
549 /* This function is getting ALMOST long enough to break up into
550 several. Here is some rationale:
552 NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware):
553 There are several file descriptors that may need to be open
554 for any given process or LWP. The ones we're intereted in are:
555 - control (ctl) write-only change the state
556 - status (status) read-only query the state
557 - address space (as) read/write access memory
558 - map (map) read-only virtual addr map
559 Most of these are opened lazily as they are needed.
560 The pathnames for the 'files' for an LWP look slightly
561 different from those of a first-class process:
562 Pathnames for a process (<proc-id>):
564 /proc/<proc-id>/status
567 Pathnames for an LWP (lwp-id):
568 /proc/<proc-id>/lwp/<lwp-id>/lwpctl
569 /proc/<proc-id>/lwp/<lwp-id>/lwpstatus
570 An LWP has no map or address space file descriptor, since
571 the memory map and address space are shared by all LWPs.
573 Everyone else (Solaris 2.5, Irix, OSF)
574 There is only one file descriptor for each process or LWP.
575 For convenience, we copy the same file descriptor into all
576 three fields of the procinfo struct (ctl_fd, status_fd, and
577 as_fd, see NEW_PROC_API above) so that code that uses them
578 doesn't need any #ifdef's.
583 Each LWP has an independent file descriptor, but these
584 are not obtained via the 'open' system call like the rest:
585 instead, they're obtained thru an ioctl call (PIOCOPENLWP)
586 to the file descriptor of the parent process.
589 These do not even have their own independent file descriptor.
590 All operations are carried out on the file descriptor of the
591 parent process. Therefore we just call open again for each
592 thread, getting a new handle for the same 'file'. */
595 /* In this case, there are several different file descriptors that
596 we might be asked to open. The control file descriptor will be
597 opened early, but the others will be opened lazily as they are
600 strcpy (tmp, pi->pathname);
601 switch (which) { /* Which file descriptor to open? */
604 strcat (tmp, "/lwpctl");
606 strcat (tmp, "/ctl");
607 fd = open_with_retry (tmp, O_WRONLY);
614 return 0; /* There is no 'as' file descriptor for an lwp. */
616 fd = open_with_retry (tmp, O_RDWR);
623 strcat (tmp, "/lwpstatus");
625 strcat (tmp, "/status");
626 fd = open_with_retry (tmp, O_RDONLY);
632 return 0; /* unknown file descriptor */
634 #else /* not NEW_PROC_API */
635 /* In this case, there is only one file descriptor for each procinfo
636 (ie. each process or LWP). In fact, only the file descriptor for
637 the process can actually be opened by an 'open' system call. The
638 ones for the LWPs have to be obtained thru an IOCTL call on the
639 process's file descriptor.
641 For convenience, we copy each procinfo's single file descriptor
642 into all of the fields occupied by the several file descriptors
643 of the NEW_PROC_API implementation. That way, the code that uses
644 them can be written without ifdefs. */
647 #ifdef PIOCTSTATUS /* OSF */
648 /* Only one FD; just open it. */
649 if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0)
651 #else /* Sol 2.5, Irix, other? */
652 if (pi->tid == 0) /* Master procinfo for the process */
654 fd = open_with_retry (pi->pathname, O_RDWR);
658 else /* LWP thread procinfo */
660 #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */
664 /* Find the procinfo for the entire process. */
665 if ((process = find_procinfo (pi->pid, 0)) == NULL)
668 /* Now obtain the file descriptor for the LWP. */
669 if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0)
671 #else /* Irix, other? */
672 return 0; /* Don't know how to open threads. */
673 #endif /* Sol 2.5 PIOCOPENLWP */
675 #endif /* OSF PIOCTSTATUS */
676 pi->ctl_fd = pi->as_fd = pi->status_fd = fd;
677 #endif /* NEW_PROC_API */
679 return 1; /* success */
682 /* Allocate a data structure and link it into the procinfo list.
683 First tries to find a pre-existing one (FIXME: why?). Returns the
684 pointer to new procinfo struct. */
687 create_procinfo (int pid, int tid)
689 procinfo *pi, *parent = NULL;
691 if ((pi = find_procinfo (pid, tid)))
692 return pi; /* Already exists, nothing to do. */
694 /* Find parent before doing malloc, to save having to cleanup. */
696 parent = find_procinfo_or_die (pid, 0); /* FIXME: should I
698 doesn't exist yet? */
700 pi = (procinfo *) xmalloc (sizeof (procinfo));
701 memset (pi, 0, sizeof (procinfo));
705 #ifdef DYNAMIC_SYSCALLS
709 pi->saved_entryset = sysset_t_alloc (pi);
710 pi->saved_exitset = sysset_t_alloc (pi);
712 /* Chain into list. */
715 sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
716 pi->next = procinfo_list;
722 sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid);
724 sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
726 pi->next = parent->thread_list;
727 parent->thread_list = pi;
732 /* Close all file descriptors associated with the procinfo. */
735 close_procinfo_files (procinfo *pi)
742 if (pi->status_fd > 0)
743 close (pi->status_fd);
745 pi->ctl_fd = pi->as_fd = pi->status_fd = 0;
748 /* Destructor function. Close, unlink and deallocate the object. */
751 destroy_one_procinfo (procinfo **list, procinfo *pi)
755 /* Step one: unlink the procinfo from its list. */
759 for (ptr = *list; ptr; ptr = ptr->next)
762 ptr->next = pi->next;
766 /* Step two: close any open file descriptors. */
767 close_procinfo_files (pi);
769 /* Step three: free the memory. */
770 #ifdef DYNAMIC_SYSCALLS
773 xfree (pi->saved_entryset);
774 xfree (pi->saved_exitset);
779 destroy_procinfo (procinfo *pi)
783 if (pi->tid != 0) /* Destroy a thread procinfo. */
785 tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */
786 destroy_one_procinfo (&tmp->thread_list, pi);
788 else /* Destroy a process procinfo and all its threads. */
790 /* First destroy the children, if any; */
791 while (pi->thread_list != NULL)
792 destroy_one_procinfo (&pi->thread_list, pi->thread_list);
793 /* Then destroy the parent. Genocide!!! */
794 destroy_one_procinfo (&procinfo_list, pi);
799 do_destroy_procinfo_cleanup (void *pi)
801 destroy_procinfo (pi);
804 enum { NOKILL, KILL };
806 /* To be called on a non_recoverable error for a procinfo. Prints
807 error messages, optionally sends a SIGKILL to the process, then
808 destroys the data structure. */
811 dead_procinfo (procinfo *pi, char *msg, int kill_p)
817 print_sys_errmsg (pi->pathname, errno);
821 sprintf (procfile, "process %d", pi->pid);
822 print_sys_errmsg (procfile, errno);
825 kill (pi->pid, SIGKILL);
827 destroy_procinfo (pi);
831 /* Returns the (complete) size of a sysset_t struct. Normally, this
832 is just sizeof (sysset_t), but in the case of Monterey/64, the
833 actual size of sysset_t isn't known until runtime. */
836 sysset_t_size (procinfo * pi)
838 #ifndef DYNAMIC_SYSCALLS
839 return sizeof (sysset_t);
841 return sizeof (sysset_t) - sizeof (uint64_t)
842 + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
843 / (8 * sizeof (uint64_t)));
847 /* Allocate and (partially) initialize a sysset_t struct. */
850 sysset_t_alloc (procinfo * pi)
853 int size = sysset_t_size (pi);
855 ret = xmalloc (size);
856 #ifdef DYNAMIC_SYSCALLS
857 ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
858 / (8 * sizeof (uint64_t)));
863 #ifdef DYNAMIC_SYSCALLS
865 /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize
866 pi->num_syscalls with the number of syscalls and pi->syscall_names
867 with the names. (Certain numbers may be skipped in which case the
868 names for these numbers will be left as NULL.) */
870 #define MAX_SYSCALL_NAME_LENGTH 256
871 #define MAX_SYSCALLS 65536
874 load_syscalls (procinfo *pi)
876 char pathname[MAX_PROC_NAME_SIZE];
879 prsyscall_t *syscalls;
880 int i, size, maxcall;
882 pi->num_syscalls = 0;
883 pi->syscall_names = 0;
885 /* Open the file descriptor for the sysent file. */
886 sprintf (pathname, "/proc/%d/sysent", pi->pid);
887 sysent_fd = open_with_retry (pathname, O_RDONLY);
890 error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid);
893 size = sizeof header - sizeof (prsyscall_t);
894 if (read (sysent_fd, &header, size) != size)
896 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
899 if (header.pr_nsyscalls == 0)
901 error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"),
905 size = header.pr_nsyscalls * sizeof (prsyscall_t);
906 syscalls = xmalloc (size);
908 if (read (sysent_fd, syscalls, size) != size)
911 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
914 /* Find maximum syscall number. This may not be the same as
915 pr_nsyscalls since that value refers to the number of entries
916 in the table. (Also, the docs indicate that some system
917 call numbers may be skipped.) */
919 maxcall = syscalls[0].pr_number;
921 for (i = 1; i < header.pr_nsyscalls; i++)
922 if (syscalls[i].pr_number > maxcall
923 && syscalls[i].pr_nameoff > 0
924 && syscalls[i].pr_number < MAX_SYSCALLS)
925 maxcall = syscalls[i].pr_number;
927 pi->num_syscalls = maxcall+1;
928 pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *));
930 for (i = 0; i < pi->num_syscalls; i++)
931 pi->syscall_names[i] = NULL;
933 /* Read the syscall names in. */
934 for (i = 0; i < header.pr_nsyscalls; i++)
936 char namebuf[MAX_SYSCALL_NAME_LENGTH];
940 if (syscalls[i].pr_number >= MAX_SYSCALLS
941 || syscalls[i].pr_number < 0
942 || syscalls[i].pr_nameoff <= 0
943 || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET)
944 != (off_t) syscalls[i].pr_nameoff))
947 nread = read (sysent_fd, namebuf, sizeof namebuf);
951 callnum = syscalls[i].pr_number;
953 if (pi->syscall_names[callnum] != NULL)
955 /* FIXME: Generate warning. */
959 namebuf[nread-1] = '\0';
960 size = strlen (namebuf) + 1;
961 pi->syscall_names[callnum] = xmalloc (size);
962 strncpy (pi->syscall_names[callnum], namebuf, size-1);
963 pi->syscall_names[callnum][size-1] = '\0';
970 /* Free the space allocated for the syscall names from the procinfo
974 free_syscalls (procinfo *pi)
976 if (pi->syscall_names)
980 for (i = 0; i < pi->num_syscalls; i++)
981 if (pi->syscall_names[i] != NULL)
982 xfree (pi->syscall_names[i]);
984 xfree (pi->syscall_names);
985 pi->syscall_names = 0;
989 /* Given a name, look up (and return) the corresponding syscall number.
990 If no match is found, return -1. */
993 find_syscall (procinfo *pi, char *name)
997 for (i = 0; i < pi->num_syscalls; i++)
999 if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0)
1006 /* =================== END, STRUCT PROCINFO "MODULE" =================== */
1008 /* =================== /proc "MODULE" =================== */
1010 /* This "module" is the interface layer between the /proc system API
1011 and the gdb target vector functions. This layer consists of access
1012 functions that encapsulate each of the basic operations that we
1013 need to use from the /proc API.
1015 The main motivation for this layer is to hide the fact that there
1016 are two very different implementations of the /proc API. Rather
1017 than have a bunch of #ifdefs all thru the gdb target vector
1018 functions, we do our best to hide them all in here. */
1020 int proc_get_status (procinfo * pi);
1021 long proc_flags (procinfo * pi);
1022 int proc_why (procinfo * pi);
1023 int proc_what (procinfo * pi);
1024 int proc_set_run_on_last_close (procinfo * pi);
1025 int proc_unset_run_on_last_close (procinfo * pi);
1026 int proc_set_inherit_on_fork (procinfo * pi);
1027 int proc_unset_inherit_on_fork (procinfo * pi);
1028 int proc_set_async (procinfo * pi);
1029 int proc_unset_async (procinfo * pi);
1030 int proc_stop_process (procinfo * pi);
1031 int proc_trace_signal (procinfo * pi, int signo);
1032 int proc_ignore_signal (procinfo * pi, int signo);
1033 int proc_clear_current_fault (procinfo * pi);
1034 int proc_set_current_signal (procinfo * pi, int signo);
1035 int proc_clear_current_signal (procinfo * pi);
1036 int proc_set_gregs (procinfo * pi);
1037 int proc_set_fpregs (procinfo * pi);
1038 int proc_wait_for_stop (procinfo * pi);
1039 int proc_run_process (procinfo * pi, int step, int signo);
1040 int proc_kill (procinfo * pi, int signo);
1041 int proc_parent_pid (procinfo * pi);
1042 int proc_get_nthreads (procinfo * pi);
1043 int proc_get_current_thread (procinfo * pi);
1044 int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold);
1045 int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset);
1046 int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset);
1047 int proc_set_traced_faults (procinfo * pi, fltset_t * fltset);
1048 int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset);
1050 int proc_update_threads (procinfo * pi);
1051 int proc_iterate_over_threads (procinfo * pi,
1052 int (*func) (procinfo *, procinfo *, void *),
1055 gdb_gregset_t *proc_get_gregs (procinfo * pi);
1056 gdb_fpregset_t *proc_get_fpregs (procinfo * pi);
1057 sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save);
1058 sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save);
1059 fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save);
1060 gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save);
1061 gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save);
1062 gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save);
1063 gdb_sigaction_t *proc_get_signal_actions (procinfo * pi,
1064 gdb_sigaction_t *save);
1066 void proc_warn (procinfo * pi, char *func, int line);
1067 void proc_error (procinfo * pi, char *func, int line);
1070 proc_warn (procinfo *pi, char *func, int line)
1072 sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
1073 print_sys_errmsg (errmsg, errno);
1077 proc_error (procinfo *pi, char *func, int line)
1079 sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
1080 perror_with_name (errmsg);
1083 /* Updates the status struct in the procinfo. There is a 'valid'
1084 flag, to let other functions know when this function needs to be
1085 called (so the status is only read when it is needed). The status
1086 file descriptor is also only opened when it is needed. Returns
1087 non-zero for success, zero for failure. */
1090 proc_get_status (procinfo *pi)
1092 /* Status file descriptor is opened "lazily". */
1093 if (pi->status_fd == 0 &&
1094 open_procinfo_files (pi, FD_STATUS) == 0)
1096 pi->status_valid = 0;
1101 if (lseek (pi->status_fd, 0, SEEK_SET) < 0)
1102 pi->status_valid = 0; /* fail */
1105 /* Sigh... I have to read a different data structure,
1106 depending on whether this is a main process or an LWP. */
1108 pi->status_valid = (read (pi->status_fd,
1109 (char *) &pi->prstatus.pr_lwp,
1110 sizeof (lwpstatus_t))
1111 == sizeof (lwpstatus_t));
1114 pi->status_valid = (read (pi->status_fd,
1115 (char *) &pi->prstatus,
1116 sizeof (gdb_prstatus_t))
1117 == sizeof (gdb_prstatus_t));
1118 #if 0 /*def UNIXWARE*/
1119 if (pi->status_valid &&
1120 (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) &&
1121 pi->prstatus.pr_lwp.pr_why == PR_REQUESTED)
1122 /* Unixware peculiarity -- read the damn thing again! */
1123 pi->status_valid = (read (pi->status_fd,
1124 (char *) &pi->prstatus,
1125 sizeof (gdb_prstatus_t))
1126 == sizeof (gdb_prstatus_t));
1127 #endif /* UNIXWARE */
1130 #else /* ioctl method */
1131 #ifdef PIOCTSTATUS /* osf */
1132 if (pi->tid == 0) /* main process */
1134 /* Just read the danged status. Now isn't that simple? */
1136 (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
1143 tid_t pr_error_thread;
1144 struct prstatus status;
1147 thread_status.pr_count = 1;
1148 thread_status.status.pr_tid = pi->tid;
1149 win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0);
1152 memcpy (&pi->prstatus, &thread_status.status,
1153 sizeof (pi->prstatus));
1154 pi->status_valid = 1;
1158 /* Just read the danged status. Now isn't that simple? */
1159 pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
1163 if (pi->status_valid)
1165 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1168 proc_get_current_thread (pi));
1171 /* The status struct includes general regs, so mark them valid too. */
1172 pi->gregs_valid = pi->status_valid;
1174 /* In the read/write multiple-fd model, the status struct includes
1175 the fp regs too, so mark them valid too. */
1176 pi->fpregs_valid = pi->status_valid;
1178 return pi->status_valid; /* True if success, false if failure. */
1181 /* Returns the process flags (pr_flags field). */
1184 proc_flags (procinfo *pi)
1186 if (!pi->status_valid)
1187 if (!proc_get_status (pi))
1188 return 0; /* FIXME: not a good failure value (but what is?) */
1192 /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in
1193 pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t.
1194 The two sets of flags don't overlap. */
1195 return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags;
1197 return pi->prstatus.pr_lwp.pr_flags;
1200 return pi->prstatus.pr_flags;
1204 /* Returns the pr_why field (why the process stopped). */
1207 proc_why (procinfo *pi)
1209 if (!pi->status_valid)
1210 if (!proc_get_status (pi))
1211 return 0; /* FIXME: not a good failure value (but what is?) */
1214 return pi->prstatus.pr_lwp.pr_why;
1216 return pi->prstatus.pr_why;
1220 /* Returns the pr_what field (details of why the process stopped). */
1223 proc_what (procinfo *pi)
1225 if (!pi->status_valid)
1226 if (!proc_get_status (pi))
1227 return 0; /* FIXME: not a good failure value (but what is?) */
1230 return pi->prstatus.pr_lwp.pr_what;
1232 return pi->prstatus.pr_what;
1236 /* This function is only called when PI is stopped by a watchpoint.
1237 Assuming the OS supports it, write to *ADDR the data address which
1238 triggered it and return 1. Return 0 if it is not possible to know
1242 proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr)
1244 if (!pi->status_valid)
1245 if (!proc_get_status (pi))
1249 *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch,
1250 builtin_type (target_gdbarch)->builtin_data_ptr,
1251 (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr);
1253 *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch,
1254 builtin_type (target_gdbarch)->builtin_data_ptr,
1255 (gdb_byte *) &pi->prstatus.pr_info.si_addr);
1260 #ifndef PIOCSSPCACT /* The following is not supported on OSF. */
1262 /* Returns the pr_nsysarg field (number of args to the current
1266 proc_nsysarg (procinfo *pi)
1268 if (!pi->status_valid)
1269 if (!proc_get_status (pi))
1273 return pi->prstatus.pr_lwp.pr_nsysarg;
1275 return pi->prstatus.pr_nsysarg;
1279 /* Returns the pr_sysarg field (pointer to the arguments of current
1283 proc_sysargs (procinfo *pi)
1285 if (!pi->status_valid)
1286 if (!proc_get_status (pi))
1290 return (long *) &pi->prstatus.pr_lwp.pr_sysarg;
1292 return (long *) &pi->prstatus.pr_sysarg;
1296 /* Returns the pr_syscall field (id of current syscall if we are in
1300 proc_syscall (procinfo *pi)
1302 if (!pi->status_valid)
1303 if (!proc_get_status (pi))
1307 return pi->prstatus.pr_lwp.pr_syscall;
1309 return pi->prstatus.pr_syscall;
1312 #endif /* PIOCSSPCACT */
1314 /* Returns the pr_cursig field (current signal). */
1317 proc_cursig (struct procinfo *pi)
1319 if (!pi->status_valid)
1320 if (!proc_get_status (pi))
1321 return 0; /* FIXME: not a good failure value (but what is?) */
1324 return pi->prstatus.pr_lwp.pr_cursig;
1326 return pi->prstatus.pr_cursig;
1330 /* === I appologize for the messiness of this function.
1331 === This is an area where the different versions of
1332 === /proc are more inconsistent than usual.
1334 Set or reset any of the following process flags:
1335 PR_FORK -- forked child will inherit trace flags
1336 PR_RLC -- traced process runs when last /proc file closed.
1337 PR_KLC -- traced process is killed when last /proc file closed.
1338 PR_ASYNC -- LWP's get to run/stop independently.
1340 There are three methods for doing this function:
1341 1) Newest: read/write [PCSET/PCRESET/PCUNSET]
1343 2) Middle: PIOCSET/PIOCRESET
1345 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC
1348 Note: Irix does not define PR_ASYNC.
1349 Note: OSF does not define PR_KLC.
1350 Note: OSF is the only one that can ONLY use the oldest method.
1354 flag -- one of PR_FORK, PR_RLC, or PR_ASYNC
1355 mode -- 1 for set, 0 for reset.
1357 Returns non-zero for success, zero for failure. */
1359 enum { FLAG_RESET, FLAG_SET };
1362 proc_modify_flag (procinfo *pi, long flag, long mode)
1364 long win = 0; /* default to fail */
1366 /* These operations affect the process as a whole, and applying them
1367 to an individual LWP has the same meaning as applying them to the
1368 main process. Therefore, if we're ever called with a pointer to
1369 an LWP's procinfo, let's substitute the process's procinfo and
1370 avoid opening the LWP's file descriptor unnecessarily. */
1373 pi = find_procinfo_or_die (pi->pid, 0);
1375 #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii. */
1376 /* First normalize the PCUNSET/PCRESET command opcode
1377 (which for no obvious reason has a different definition
1378 from one operating system to the next...) */
1380 #define GDBRESET PCUNSET
1383 #define GDBRESET PCRESET
1387 procfs_ctl_t arg[2];
1389 if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */
1391 else /* Reset the flag. */
1395 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
1398 #ifdef PIOCSET /* Irix/Sol5 method */
1399 if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */
1401 win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0);
1403 else /* Reset the flag. */
1405 win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0);
1409 #ifdef PIOCSRLC /* Oldest method: OSF */
1412 if (mode == FLAG_SET) /* Set run-on-last-close */
1414 win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0);
1416 else /* Clear run-on-last-close */
1418 win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0);
1422 if (mode == FLAG_SET) /* Set inherit-on-fork */
1424 win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0);
1426 else /* Clear inherit-on-fork */
1428 win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0);
1432 win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */
1439 /* The above operation renders the procinfo's cached pstatus
1441 pi->status_valid = 0;
1444 warning (_("procfs: modify_flag failed to turn %s %s"),
1445 flag == PR_FORK ? "PR_FORK" :
1446 flag == PR_RLC ? "PR_RLC" :
1448 flag == PR_ASYNC ? "PR_ASYNC" :
1451 flag == PR_KLC ? "PR_KLC" :
1454 mode == FLAG_RESET ? "off" : "on");
1459 /* Set the run_on_last_close flag. Process with all threads will
1460 become runnable when debugger closes all /proc fds. Returns
1461 non-zero for success, zero for failure. */
1464 proc_set_run_on_last_close (procinfo *pi)
1466 return proc_modify_flag (pi, PR_RLC, FLAG_SET);
1469 /* Reset the run_on_last_close flag. The process will NOT become
1470 runnable when debugger closes its file handles. Returns non-zero
1471 for success, zero for failure. */
1474 proc_unset_run_on_last_close (procinfo *pi)
1476 return proc_modify_flag (pi, PR_RLC, FLAG_RESET);
1480 /* Set the kill_on_last_close flag. Process with all threads will be
1481 killed when debugger closes all /proc fds (or debugger exits or
1482 dies). Returns non-zero for success, zero for failure. */
1485 proc_set_kill_on_last_close (procinfo *pi)
1487 return proc_modify_flag (pi, PR_KLC, FLAG_SET);
1490 /* Reset the kill_on_last_close flag. Process will NOT be killed when
1491 debugger closes its file handles (or exits or dies). Returns
1492 non-zero for success, zero for failure. */
1495 proc_unset_kill_on_last_close (procinfo *pi)
1497 return proc_modify_flag (pi, PR_KLC, FLAG_RESET);
1501 /* Set inherit_on_fork flag. If the process forks a child while we
1502 are registered for events in the parent, then we will also recieve
1503 events from the child. Returns non-zero for success, zero for
1507 proc_set_inherit_on_fork (procinfo *pi)
1509 return proc_modify_flag (pi, PR_FORK, FLAG_SET);
1512 /* Reset inherit_on_fork flag. If the process forks a child while we
1513 are registered for events in the parent, then we will NOT recieve
1514 events from the child. Returns non-zero for success, zero for
1518 proc_unset_inherit_on_fork (procinfo *pi)
1520 return proc_modify_flag (pi, PR_FORK, FLAG_RESET);
1524 /* Set PR_ASYNC flag. If one LWP stops because of a debug event
1525 (signal etc.), the remaining LWPs will continue to run. Returns
1526 non-zero for success, zero for failure. */
1529 proc_set_async (procinfo *pi)
1531 return proc_modify_flag (pi, PR_ASYNC, FLAG_SET);
1534 /* Reset PR_ASYNC flag. If one LWP stops because of a debug event
1535 (signal etc.), then all other LWPs will stop as well. Returns
1536 non-zero for success, zero for failure. */
1539 proc_unset_async (procinfo *pi)
1541 return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET);
1543 #endif /* PR_ASYNC */
1545 /* Request the process/LWP to stop. Does not wait. Returns non-zero
1546 for success, zero for failure. */
1549 proc_stop_process (procinfo *pi)
1553 /* We might conceivably apply this operation to an LWP, and the
1554 LWP's ctl file descriptor might not be open. */
1556 if (pi->ctl_fd == 0 &&
1557 open_procinfo_files (pi, FD_CTL) == 0)
1562 procfs_ctl_t cmd = PCSTOP;
1564 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1565 #else /* ioctl method */
1566 win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0);
1567 /* Note: the call also reads the prstatus. */
1570 pi->status_valid = 1;
1571 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1574 proc_get_current_thread (pi));
1582 /* Wait for the process or LWP to stop (block until it does). Returns
1583 non-zero for success, zero for failure. */
1586 proc_wait_for_stop (procinfo *pi)
1590 /* We should never have to apply this operation to any procinfo
1591 except the one for the main process. If that ever changes for
1592 any reason, then take out the following clause and replace it
1593 with one that makes sure the ctl_fd is open. */
1596 pi = find_procinfo_or_die (pi->pid, 0);
1600 procfs_ctl_t cmd = PCWSTOP;
1602 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1603 /* We been runnin' and we stopped -- need to update status. */
1604 pi->status_valid = 0;
1606 #else /* ioctl method */
1607 win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0);
1608 /* Above call also refreshes the prstatus. */
1611 pi->status_valid = 1;
1612 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1615 proc_get_current_thread (pi));
1622 /* Make the process or LWP runnable.
1624 Options (not all are implemented):
1626 - clear current fault
1627 - clear current signal
1628 - abort the current system call
1629 - stop as soon as finished with system call
1630 - (ioctl): set traced signal set
1631 - (ioctl): set held signal set
1632 - (ioctl): set traced fault set
1633 - (ioctl): set start pc (vaddr)
1635 Always clears the current fault. PI is the process or LWP to
1636 operate on. If STEP is true, set the process or LWP to trap after
1637 one instruction. If SIGNO is zero, clear the current signal if
1638 any; if non-zero, set the current signal to this one. Returns
1639 non-zero for success, zero for failure. */
1642 proc_run_process (procinfo *pi, int step, int signo)
1647 /* We will probably have to apply this operation to individual
1648 threads, so make sure the control file descriptor is open. */
1650 if (pi->ctl_fd == 0 &&
1651 open_procinfo_files (pi, FD_CTL) == 0)
1656 runflags = PRCFAULT; /* Always clear current fault. */
1661 else if (signo != -1) /* -1 means do nothing W.R.T. signals. */
1662 proc_set_current_signal (pi, signo);
1666 procfs_ctl_t cmd[2];
1670 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1672 #else /* ioctl method */
1676 memset (&prrun, 0, sizeof (prrun));
1677 prrun.pr_flags = runflags;
1678 win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0);
1685 /* Register to trace signals in the process or LWP. Returns non-zero
1686 for success, zero for failure. */
1689 proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset)
1693 /* We should never have to apply this operation to any procinfo
1694 except the one for the main process. If that ever changes for
1695 any reason, then take out the following clause and replace it
1696 with one that makes sure the ctl_fd is open. */
1699 pi = find_procinfo_or_die (pi->pid, 0);
1705 /* Use char array to avoid alignment issues. */
1706 char sigset[sizeof (gdb_sigset_t)];
1710 memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t));
1712 win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
1714 #else /* ioctl method */
1715 win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0);
1717 /* The above operation renders the procinfo's cached pstatus obsolete. */
1718 pi->status_valid = 0;
1721 warning (_("procfs: set_traced_signals failed"));
1725 /* Register to trace hardware faults in the process or LWP. Returns
1726 non-zero for success, zero for failure. */
1729 proc_set_traced_faults (procinfo *pi, fltset_t *fltset)
1733 /* We should never have to apply this operation to any procinfo
1734 except the one for the main process. If that ever changes for
1735 any reason, then take out the following clause and replace it
1736 with one that makes sure the ctl_fd is open. */
1739 pi = find_procinfo_or_die (pi->pid, 0);
1745 /* Use char array to avoid alignment issues. */
1746 char fltset[sizeof (fltset_t)];
1750 memcpy (&arg.fltset, fltset, sizeof (fltset_t));
1752 win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
1754 #else /* ioctl method */
1755 win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0);
1757 /* The above operation renders the procinfo's cached pstatus obsolete. */
1758 pi->status_valid = 0;
1763 /* Register to trace entry to system calls in the process or LWP.
1764 Returns non-zero for success, zero for failure. */
1767 proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset)
1771 /* We should never have to apply this operation to any procinfo
1772 except the one for the main process. If that ever changes for
1773 any reason, then take out the following clause and replace it
1774 with one that makes sure the ctl_fd is open. */
1777 pi = find_procinfo_or_die (pi->pid, 0);
1781 struct gdb_proc_ctl_pcsentry {
1783 /* Use char array to avoid alignment issues. */
1784 char sysset[sizeof (sysset_t)];
1786 int argp_size = sizeof (struct gdb_proc_ctl_pcsentry)
1788 + sysset_t_size (pi);
1790 argp = xmalloc (argp_size);
1792 argp->cmd = PCSENTRY;
1793 memcpy (&argp->sysset, sysset, sysset_t_size (pi));
1795 win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
1798 #else /* ioctl method */
1799 win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0);
1801 /* The above operation renders the procinfo's cached pstatus
1803 pi->status_valid = 0;
1808 /* Register to trace exit from system calls in the process or LWP.
1809 Returns non-zero for success, zero for failure. */
1812 proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset)
1816 /* We should never have to apply this operation to any procinfo
1817 except the one for the main process. If that ever changes for
1818 any reason, then take out the following clause and replace it
1819 with one that makes sure the ctl_fd is open. */
1822 pi = find_procinfo_or_die (pi->pid, 0);
1826 struct gdb_proc_ctl_pcsexit {
1828 /* Use char array to avoid alignment issues. */
1829 char sysset[sizeof (sysset_t)];
1831 int argp_size = sizeof (struct gdb_proc_ctl_pcsexit)
1833 + sysset_t_size (pi);
1835 argp = xmalloc (argp_size);
1837 argp->cmd = PCSEXIT;
1838 memcpy (&argp->sysset, sysset, sysset_t_size (pi));
1840 win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
1843 #else /* ioctl method */
1844 win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0);
1846 /* The above operation renders the procinfo's cached pstatus
1848 pi->status_valid = 0;
1853 /* Specify the set of blocked / held signals in the process or LWP.
1854 Returns non-zero for success, zero for failure. */
1857 proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold)
1861 /* We should never have to apply this operation to any procinfo
1862 except the one for the main process. If that ever changes for
1863 any reason, then take out the following clause and replace it
1864 with one that makes sure the ctl_fd is open. */
1867 pi = find_procinfo_or_die (pi->pid, 0);
1873 /* Use char array to avoid alignment issues. */
1874 char hold[sizeof (gdb_sigset_t)];
1878 memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t));
1879 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
1882 win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0);
1884 /* The above operation renders the procinfo's cached pstatus
1886 pi->status_valid = 0;
1891 /* Returns the set of signals that are pending in the process or LWP.
1892 Will also copy the sigset if SAVE is non-zero. */
1895 proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save)
1897 gdb_sigset_t *ret = NULL;
1899 /* We should never have to apply this operation to any procinfo
1900 except the one for the main process. If that ever changes for
1901 any reason, then take out the following clause and replace it
1902 with one that makes sure the ctl_fd is open. */
1905 pi = find_procinfo_or_die (pi->pid, 0);
1907 if (!pi->status_valid)
1908 if (!proc_get_status (pi))
1912 ret = &pi->prstatus.pr_lwp.pr_lwppend;
1914 ret = &pi->prstatus.pr_sigpend;
1917 memcpy (save, ret, sizeof (gdb_sigset_t));
1922 /* Returns the set of signal actions. Will also copy the sigactionset
1923 if SAVE is non-zero. */
1926 proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save)
1928 gdb_sigaction_t *ret = NULL;
1930 /* We should never have to apply this operation to any procinfo
1931 except the one for the main process. If that ever changes for
1932 any reason, then take out the following clause and replace it
1933 with one that makes sure the ctl_fd is open. */
1936 pi = find_procinfo_or_die (pi->pid, 0);
1938 if (!pi->status_valid)
1939 if (!proc_get_status (pi))
1943 ret = &pi->prstatus.pr_lwp.pr_action;
1945 ret = &pi->prstatus.pr_action;
1948 memcpy (save, ret, sizeof (gdb_sigaction_t));
1953 /* Returns the set of signals that are held / blocked. Will also copy
1954 the sigset if SAVE is non-zero. */
1957 proc_get_held_signals (procinfo *pi, gdb_sigset_t *save)
1959 gdb_sigset_t *ret = NULL;
1961 /* We should never have to apply this operation to any procinfo
1962 except the one for the main process. If that ever changes for
1963 any reason, then take out the following clause and replace it
1964 with one that makes sure the ctl_fd is open. */
1967 pi = find_procinfo_or_die (pi->pid, 0);
1970 if (!pi->status_valid)
1971 if (!proc_get_status (pi))
1975 ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask;
1977 ret = &pi->prstatus.pr_lwp.pr_lwphold;
1978 #endif /* UNIXWARE */
1979 #else /* not NEW_PROC_API */
1981 static gdb_sigset_t sigheld;
1983 if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0)
1986 #endif /* NEW_PROC_API */
1988 memcpy (save, ret, sizeof (gdb_sigset_t));
1993 /* Returns the set of signals that are traced / debugged. Will also
1994 copy the sigset if SAVE is non-zero. */
1997 proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save)
1999 gdb_sigset_t *ret = NULL;
2001 /* We should never have to apply this operation to any procinfo
2002 except the one for the main process. If that ever changes for
2003 any reason, then take out the following clause and replace it
2004 with one that makes sure the ctl_fd is open. */
2007 pi = find_procinfo_or_die (pi->pid, 0);
2010 if (!pi->status_valid)
2011 if (!proc_get_status (pi))
2014 ret = &pi->prstatus.pr_sigtrace;
2017 static gdb_sigset_t sigtrace;
2019 if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0)
2024 memcpy (save, ret, sizeof (gdb_sigset_t));
2029 /* Add SIGNO to the set of signals that are traced. Returns non-zero
2030 for success, zero for failure. */
2033 proc_trace_signal (procinfo *pi, int signo)
2037 /* We should never have to apply this operation to any procinfo
2038 except the one for the main process. If that ever changes for
2039 any reason, then take out the following clause and replace it
2040 with one that makes sure the ctl_fd is open. */
2043 pi = find_procinfo_or_die (pi->pid, 0);
2047 if (proc_get_traced_signals (pi, &temp))
2049 gdb_praddset (&temp, signo);
2050 return proc_set_traced_signals (pi, &temp);
2054 return 0; /* failure */
2057 /* Remove SIGNO from the set of signals that are traced. Returns
2058 non-zero for success, zero for failure. */
2061 proc_ignore_signal (procinfo *pi, int signo)
2065 /* We should never have to apply this operation to any procinfo
2066 except the one for the main process. If that ever changes for
2067 any reason, then take out the following clause and replace it
2068 with one that makes sure the ctl_fd is open. */
2071 pi = find_procinfo_or_die (pi->pid, 0);
2075 if (proc_get_traced_signals (pi, &temp))
2077 gdb_prdelset (&temp, signo);
2078 return proc_set_traced_signals (pi, &temp);
2082 return 0; /* failure */
2085 /* Returns the set of hardware faults that are traced /debugged. Will
2086 also copy the faultset if SAVE is non-zero. */
2089 proc_get_traced_faults (procinfo *pi, fltset_t *save)
2091 fltset_t *ret = NULL;
2093 /* We should never have to apply this operation to any procinfo
2094 except the one for the main process. If that ever changes for
2095 any reason, then take out the following clause and replace it
2096 with one that makes sure the ctl_fd is open. */
2099 pi = find_procinfo_or_die (pi->pid, 0);
2102 if (!pi->status_valid)
2103 if (!proc_get_status (pi))
2106 ret = &pi->prstatus.pr_flttrace;
2109 static fltset_t flttrace;
2111 if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0)
2116 memcpy (save, ret, sizeof (fltset_t));
2121 /* Returns the set of syscalls that are traced /debugged on entry.
2122 Will also copy the syscall set if SAVE is non-zero. */
2125 proc_get_traced_sysentry (procinfo *pi, sysset_t *save)
2127 sysset_t *ret = NULL;
2129 /* We should never have to apply this operation to any procinfo
2130 except the one for the main process. If that ever changes for
2131 any reason, then take out the following clause and replace it
2132 with one that makes sure the ctl_fd is open. */
2135 pi = find_procinfo_or_die (pi->pid, 0);
2138 if (!pi->status_valid)
2139 if (!proc_get_status (pi))
2142 #ifndef DYNAMIC_SYSCALLS
2143 ret = &pi->prstatus.pr_sysentry;
2144 #else /* DYNAMIC_SYSCALLS */
2146 static sysset_t *sysentry;
2150 sysentry = sysset_t_alloc (pi);
2152 if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
2154 if (pi->prstatus.pr_sysentry_offset == 0)
2156 gdb_premptysysset (sysentry);
2162 if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset,
2164 != (off_t) pi->prstatus.pr_sysentry_offset)
2166 size = sysset_t_size (pi);
2167 gdb_premptysysset (sysentry);
2168 rsize = read (pi->status_fd, sysentry, size);
2173 #endif /* DYNAMIC_SYSCALLS */
2174 #else /* !NEW_PROC_API */
2176 static sysset_t sysentry;
2178 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0)
2181 #endif /* NEW_PROC_API */
2183 memcpy (save, ret, sysset_t_size (pi));
2188 /* Returns the set of syscalls that are traced /debugged on exit.
2189 Will also copy the syscall set if SAVE is non-zero. */
2192 proc_get_traced_sysexit (procinfo *pi, sysset_t *save)
2194 sysset_t * ret = NULL;
2196 /* We should never have to apply this operation to any procinfo
2197 except the one for the main process. If that ever changes for
2198 any reason, then take out the following clause and replace it
2199 with one that makes sure the ctl_fd is open. */
2202 pi = find_procinfo_or_die (pi->pid, 0);
2205 if (!pi->status_valid)
2206 if (!proc_get_status (pi))
2209 #ifndef DYNAMIC_SYSCALLS
2210 ret = &pi->prstatus.pr_sysexit;
2211 #else /* DYNAMIC_SYSCALLS */
2213 static sysset_t *sysexit;
2217 sysexit = sysset_t_alloc (pi);
2219 if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
2221 if (pi->prstatus.pr_sysexit_offset == 0)
2223 gdb_premptysysset (sysexit);
2229 if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset,
2231 != (off_t) pi->prstatus.pr_sysexit_offset)
2233 size = sysset_t_size (pi);
2234 gdb_premptysysset (sysexit);
2235 rsize = read (pi->status_fd, sysexit, size);
2240 #endif /* DYNAMIC_SYSCALLS */
2243 static sysset_t sysexit;
2245 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0)
2250 memcpy (save, ret, sysset_t_size (pi));
2255 /* The current fault (if any) is cleared; the associated signal will
2256 not be sent to the process or LWP when it resumes. Returns
2257 non-zero for success, zero for failure. */
2260 proc_clear_current_fault (procinfo *pi)
2264 /* We should never have to apply this operation to any procinfo
2265 except the one for the main process. If that ever changes for
2266 any reason, then take out the following clause and replace it
2267 with one that makes sure the ctl_fd is open. */
2270 pi = find_procinfo_or_die (pi->pid, 0);
2274 procfs_ctl_t cmd = PCCFAULT;
2276 win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd));
2279 win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0);
2285 /* Set the "current signal" that will be delivered next to the
2286 process. NOTE: semantics are different from those of KILL. This
2287 signal will be delivered to the process or LWP immediately when it
2288 is resumed (even if the signal is held/blocked); it will NOT
2289 immediately cause another event of interest, and will NOT first
2290 trap back to the debugger. Returns non-zero for success, zero for
2294 proc_set_current_signal (procinfo *pi, int signo)
2299 /* Use char array to avoid alignment issues. */
2300 char sinfo[sizeof (gdb_siginfo_t)];
2302 gdb_siginfo_t mysinfo;
2304 struct target_waitstatus wait_status;
2306 /* We should never have to apply this operation to any procinfo
2307 except the one for the main process. If that ever changes for
2308 any reason, then take out the following clause and replace it
2309 with one that makes sure the ctl_fd is open. */
2312 pi = find_procinfo_or_die (pi->pid, 0);
2314 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
2315 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
2316 receives a PIOCSSIG with a signal identical to the current
2317 signal, it messes up the current signal. Work around the kernel
2320 signo == proc_cursig (pi))
2321 return 1; /* I assume this is a success? */
2324 /* The pointer is just a type alias. */
2325 get_last_target_status (&wait_ptid, &wait_status);
2326 if (ptid_equal (wait_ptid, inferior_ptid)
2327 && wait_status.kind == TARGET_WAITKIND_STOPPED
2328 && wait_status.value.sig == target_signal_from_host (signo)
2329 && proc_get_status (pi)
2331 && pi->prstatus.pr_lwp.pr_info.si_signo == signo
2333 && pi->prstatus.pr_info.si_signo == signo
2336 /* Use the siginfo associated with the signal being
2339 memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t));
2341 memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t));
2345 mysinfo.si_signo = signo;
2346 mysinfo.si_code = 0;
2347 mysinfo.si_pid = getpid (); /* ?why? */
2348 mysinfo.si_uid = getuid (); /* ?why? */
2349 memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t));
2354 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2356 win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0);
2362 /* The current signal (if any) is cleared, and is not sent to the
2363 process or LWP when it resumes. Returns non-zero for success, zero
2367 proc_clear_current_signal (procinfo *pi)
2371 /* We should never have to apply this operation to any procinfo
2372 except the one for the main process. If that ever changes for
2373 any reason, then take out the following clause and replace it
2374 with one that makes sure the ctl_fd is open. */
2377 pi = find_procinfo_or_die (pi->pid, 0);
2383 /* Use char array to avoid alignment issues. */
2384 char sinfo[sizeof (gdb_siginfo_t)];
2386 gdb_siginfo_t mysinfo;
2389 /* The pointer is just a type alias. */
2390 mysinfo.si_signo = 0;
2391 mysinfo.si_code = 0;
2392 mysinfo.si_errno = 0;
2393 mysinfo.si_pid = getpid (); /* ?why? */
2394 mysinfo.si_uid = getuid (); /* ?why? */
2395 memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t));
2397 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2400 win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0);
2406 /* Return the general-purpose registers for the process or LWP
2407 corresponding to PI. Upon failure, return NULL. */
2410 proc_get_gregs (procinfo *pi)
2412 if (!pi->status_valid || !pi->gregs_valid)
2413 if (!proc_get_status (pi))
2416 /* OK, sorry about the ifdef's. There's three cases instead of two,
2417 because in this case Unixware and Solaris/RW differ. */
2420 # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */
2421 return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs;
2423 return &pi->prstatus.pr_lwp.pr_reg;
2426 return &pi->prstatus.pr_reg;
2430 /* Return the general-purpose registers for the process or LWP
2431 corresponding to PI. Upon failure, return NULL. */
2434 proc_get_fpregs (procinfo *pi)
2437 if (!pi->status_valid || !pi->fpregs_valid)
2438 if (!proc_get_status (pi))
2441 # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */
2442 return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs;
2444 return &pi->prstatus.pr_lwp.pr_fpreg;
2447 #else /* not NEW_PROC_API */
2448 if (pi->fpregs_valid)
2449 return &pi->fpregset; /* Already got 'em. */
2452 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2461 tid_t pr_error_thread;
2462 tfpregset_t thread_1;
2465 thread_fpregs.pr_count = 1;
2466 thread_fpregs.thread_1.tid = pi->tid;
2469 && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
2471 pi->fpregs_valid = 1;
2472 return &pi->fpregset; /* Got 'em now! */
2474 else if (pi->tid != 0
2475 && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0)
2477 memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs,
2478 sizeof (pi->fpregset));
2479 pi->fpregs_valid = 1;
2480 return &pi->fpregset; /* Got 'em now! */
2487 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
2489 pi->fpregs_valid = 1;
2490 return &pi->fpregset; /* Got 'em now! */
2499 #endif /* NEW_PROC_API */
2502 /* Write the general-purpose registers back to the process or LWP
2503 corresponding to PI. Return non-zero for success, zero for
2507 proc_set_gregs (procinfo *pi)
2509 gdb_gregset_t *gregs;
2512 gregs = proc_get_gregs (pi);
2514 return 0; /* proc_get_regs has already warned. */
2516 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2525 /* Use char array to avoid alignment issues. */
2526 char gregs[sizeof (gdb_gregset_t)];
2530 memcpy (&arg.gregs, gregs, sizeof (arg.gregs));
2531 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2533 win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0);
2537 /* Policy: writing the registers invalidates our cache. */
2538 pi->gregs_valid = 0;
2542 /* Write the floating-pointer registers back to the process or LWP
2543 corresponding to PI. Return non-zero for success, zero for
2547 proc_set_fpregs (procinfo *pi)
2549 gdb_fpregset_t *fpregs;
2552 fpregs = proc_get_fpregs (pi);
2554 return 0; /* proc_get_fpregs has already warned. */
2556 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2565 /* Use char array to avoid alignment issues. */
2566 char fpregs[sizeof (gdb_fpregset_t)];
2570 memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs));
2571 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2575 win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
2580 tid_t pr_error_thread;
2581 tfpregset_t thread_1;
2584 thread_fpregs.pr_count = 1;
2585 thread_fpregs.thread_1.tid = pi->tid;
2586 memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs,
2588 win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0);
2591 win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
2593 #endif /* NEW_PROC_API */
2596 /* Policy: writing the registers invalidates our cache. */
2597 pi->fpregs_valid = 0;
2601 /* Send a signal to the proc or lwp with the semantics of "kill()".
2602 Returns non-zero for success, zero for failure. */
2605 proc_kill (procinfo *pi, int signo)
2609 /* We might conceivably apply this operation to an LWP, and the
2610 LWP's ctl file descriptor might not be open. */
2612 if (pi->ctl_fd == 0 &&
2613 open_procinfo_files (pi, FD_CTL) == 0)
2620 procfs_ctl_t cmd[2];
2624 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
2625 #else /* ioctl method */
2626 /* FIXME: do I need the Alpha OSF fixups present in
2627 procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */
2628 win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0);
2635 /* Find the pid of the process that started this one. Returns the
2636 parent process pid, or zero. */
2639 proc_parent_pid (procinfo *pi)
2641 /* We should never have to apply this operation to any procinfo
2642 except the one for the main process. If that ever changes for
2643 any reason, then take out the following clause and replace it
2644 with one that makes sure the ctl_fd is open. */
2647 pi = find_procinfo_or_die (pi->pid, 0);
2649 if (!pi->status_valid)
2650 if (!proc_get_status (pi))
2653 return pi->prstatus.pr_ppid;
2656 /* Convert a target address (a.k.a. CORE_ADDR) into a host address
2657 (a.k.a void pointer)! */
2659 #if (defined (PCWATCH) || defined (PIOCSWATCH)) \
2660 && !(defined (PIOCOPENLWP) || defined (UNIXWARE))
2662 procfs_address_to_host_pointer (CORE_ADDR addr)
2664 struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr;
2667 gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type));
2668 gdbarch_address_to_pointer (target_gdbarch, ptr_type,
2669 (gdb_byte *) &ptr, addr);
2675 proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags)
2677 #if !defined (PCWATCH) && !defined (PIOCSWATCH)
2678 /* If neither or these is defined, we can't support watchpoints.
2679 This just avoids possibly failing to compile the below on such
2683 /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */
2684 #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out. */
2689 char watch[sizeof (prwatch_t)];
2693 /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to
2694 convert a target address into something that can be stored in a
2695 native data structure. */
2696 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
2697 pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr);
2699 pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr);
2701 pwatch.pr_size = len;
2702 pwatch.pr_wflags = wflags;
2703 #if defined(NEW_PROC_API) && defined (PCWATCH)
2705 memcpy (arg.watch, &pwatch, sizeof (prwatch_t));
2706 return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg));
2708 #if defined (PIOCSWATCH)
2709 return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0);
2711 return 0; /* Fail */
2718 #if (defined(__i386__) || defined(__x86_64__)) && defined (sun)
2720 #include <sys/sysi86.h>
2722 /* The KEY is actually the value of the lower 16 bits of the GS
2723 register for the LWP that we're interested in. Returns the
2724 matching ssh struct (LDT entry). */
2727 proc_get_LDT_entry (procinfo *pi, int key)
2729 static struct ssd *ldt_entry = NULL;
2731 char pathname[MAX_PROC_NAME_SIZE];
2732 struct cleanup *old_chain = NULL;
2735 /* Allocate space for one LDT entry.
2736 This alloc must persist, because we return a pointer to it. */
2737 if (ldt_entry == NULL)
2738 ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd));
2740 /* Open the file descriptor for the LDT table. */
2741 sprintf (pathname, "/proc/%d/ldt", pi->pid);
2742 if ((fd = open_with_retry (pathname, O_RDONLY)) < 0)
2744 proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__);
2747 /* Make sure it gets closed again! */
2748 old_chain = make_cleanup_close (fd);
2750 /* Now 'read' thru the table, find a match and return it. */
2751 while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd))
2753 if (ldt_entry->sel == 0 &&
2754 ldt_entry->bo == 0 &&
2755 ldt_entry->acc1 == 0 &&
2756 ldt_entry->acc2 == 0)
2757 break; /* end of table */
2758 /* If key matches, return this entry. */
2759 if (ldt_entry->sel == key)
2762 /* Loop ended, match not found. */
2766 static int nalloc = 0;
2768 /* Get the number of LDT entries. */
2769 if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0)
2771 proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__);
2775 /* Allocate space for the number of LDT entries. */
2776 /* This alloc has to persist, 'cause we return a pointer to it. */
2779 ldt_entry = (struct ssd *)
2780 xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd));
2784 /* Read the whole table in one gulp. */
2785 if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0)
2787 proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__);
2791 /* Search the table and return the (first) entry matching 'key'. */
2792 for (i = 0; i < nldt; i++)
2793 if (ldt_entry[i].sel == key)
2794 return &ldt_entry[i];
2796 /* Loop ended, match not found. */
2801 /* Returns the pointer to the LDT entry of PTID. */
2804 procfs_find_LDT_entry (ptid_t ptid)
2806 gdb_gregset_t *gregs;
2810 /* Find procinfo for the lwp. */
2811 if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL)
2813 warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."),
2814 PIDGET (ptid), TIDGET (ptid));
2817 /* get its general registers. */
2818 if ((gregs = proc_get_gregs (pi)) == NULL)
2820 warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."),
2821 PIDGET (ptid), TIDGET (ptid));
2824 /* Now extract the GS register's lower 16 bits. */
2825 key = (*gregs)[GS] & 0xffff;
2827 /* Find the matching entry and return it. */
2828 return proc_get_LDT_entry (pi, key);
2833 /* =============== END, non-thread part of /proc "MODULE" =============== */
2835 /* =================== Thread "MODULE" =================== */
2837 /* NOTE: you'll see more ifdefs and duplication of functions here,
2838 since there is a different way to do threads on every OS. */
2840 /* Returns the number of threads for the process. */
2842 #if defined (PIOCNTHR) && defined (PIOCTLIST)
2845 proc_get_nthreads (procinfo *pi)
2849 if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0)
2850 proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__);
2856 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
2857 /* Solaris and Unixware version */
2859 proc_get_nthreads (procinfo *pi)
2861 if (!pi->status_valid)
2862 if (!proc_get_status (pi))
2865 /* NEW_PROC_API: only works for the process procinfo, because the
2866 LWP procinfos do not get prstatus filled in. */
2868 if (pi->tid != 0) /* Find the parent process procinfo. */
2869 pi = find_procinfo_or_die (pi->pid, 0);
2871 return pi->prstatus.pr_nlwp;
2875 /* Default version */
2877 proc_get_nthreads (procinfo *pi)
2886 Return the ID of the thread that had an event of interest.
2887 (ie. the one that hit a breakpoint or other traced event). All
2888 other things being equal, this should be the ID of a thread that is
2889 currently executing. */
2891 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
2892 /* Solaris and Unixware version */
2894 proc_get_current_thread (procinfo *pi)
2896 /* Note: this should be applied to the root procinfo for the
2897 process, not to the procinfo for an LWP. If applied to the
2898 procinfo for an LWP, it will simply return that LWP's ID. In
2899 that case, find the parent process procinfo. */
2902 pi = find_procinfo_or_die (pi->pid, 0);
2904 if (!pi->status_valid)
2905 if (!proc_get_status (pi))
2909 return pi->prstatus.pr_lwp.pr_lwpid;
2911 return pi->prstatus.pr_who;
2916 #if defined (PIOCNTHR) && defined (PIOCTLIST)
2919 proc_get_current_thread (procinfo *pi)
2921 #if 0 /* FIXME: not ready for prime time? */
2922 return pi->prstatus.pr_tid;
2929 /* Default version */
2931 proc_get_current_thread (procinfo *pi)
2939 /* Discover the IDs of all the threads within the process, and create
2940 a procinfo for each of them (chained to the parent). This
2941 unfortunately requires a different method on every OS. Returns
2942 non-zero for success, zero for failure. */
2945 proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore)
2947 if (thread && parent) /* sanity */
2949 thread->status_valid = 0;
2950 if (!proc_get_status (thread))
2951 destroy_one_procinfo (&parent->thread_list, thread);
2953 return 0; /* keep iterating */
2956 #if defined (PIOCLSTATUS)
2957 /* Solaris 2.5 (ioctl) version */
2959 proc_update_threads (procinfo *pi)
2961 gdb_prstatus_t *prstatus;
2962 struct cleanup *old_chain = NULL;
2966 /* We should never have to apply this operation to any procinfo
2967 except the one for the main process. If that ever changes for
2968 any reason, then take out the following clause and replace it
2969 with one that makes sure the ctl_fd is open. */
2972 pi = find_procinfo_or_die (pi->pid, 0);
2974 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
2976 if ((nlwp = proc_get_nthreads (pi)) <= 1)
2977 return 1; /* Process is not multi-threaded; nothing to do. */
2979 prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1));
2981 old_chain = make_cleanup (xfree, prstatus);
2982 if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0)
2983 proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__);
2985 /* Skip element zero, which represents the process as a whole. */
2986 for (i = 1; i < nlwp + 1; i++)
2988 if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL)
2989 proc_error (pi, "update_threads, create_procinfo", __LINE__);
2991 memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus));
2992 thread->status_valid = 1;
2994 pi->threads_valid = 1;
2995 do_cleanups (old_chain);
3000 /* Unixware and Solaris 6 (and later) version. */
3002 do_closedir_cleanup (void *dir)
3008 proc_update_threads (procinfo *pi)
3010 char pathname[MAX_PROC_NAME_SIZE + 16];
3011 struct dirent *direntry;
3012 struct cleanup *old_chain = NULL;
3017 /* We should never have to apply this operation to any procinfo
3018 except the one for the main process. If that ever changes for
3019 any reason, then take out the following clause and replace it
3020 with one that makes sure the ctl_fd is open. */
3023 pi = find_procinfo_or_die (pi->pid, 0);
3025 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
3029 Note: this brute-force method is the only way I know of to
3030 accomplish this task on Unixware. This method will also work on
3031 Solaris 2.6 and 2.7. There is a much simpler and more elegant
3032 way to do this on Solaris, but the margins of this manuscript are
3033 too small to write it here... ;-) */
3035 strcpy (pathname, pi->pathname);
3036 strcat (pathname, "/lwp");
3037 if ((dirp = opendir (pathname)) == NULL)
3038 proc_error (pi, "update_threads, opendir", __LINE__);
3040 old_chain = make_cleanup (do_closedir_cleanup, dirp);
3041 while ((direntry = readdir (dirp)) != NULL)
3042 if (direntry->d_name[0] != '.') /* skip '.' and '..' */
3044 lwpid = atoi (&direntry->d_name[0]);
3045 if ((thread = create_procinfo (pi->pid, lwpid)) == NULL)
3046 proc_error (pi, "update_threads, create_procinfo", __LINE__);
3048 pi->threads_valid = 1;
3049 do_cleanups (old_chain);
3056 proc_update_threads (procinfo *pi)
3061 /* We should never have to apply this operation to any procinfo
3062 except the one for the main process. If that ever changes for
3063 any reason, then take out the following clause and replace it
3064 with one that makes sure the ctl_fd is open. */
3067 pi = find_procinfo_or_die (pi->pid, 0);
3069 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
3071 nthreads = proc_get_nthreads (pi);
3073 return 0; /* Nothing to do for 1 or fewer threads. */
3075 threads = xmalloc (nthreads * sizeof (tid_t));
3077 if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0)
3078 proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__);
3080 for (i = 0; i < nthreads; i++)
3082 if (!find_procinfo (pi->pid, threads[i]))
3083 if (!create_procinfo (pi->pid, threads[i]))
3084 proc_error (pi, "update_threads, create_procinfo", __LINE__);
3086 pi->threads_valid = 1;
3090 /* Default version */
3092 proc_update_threads (procinfo *pi)
3096 #endif /* OSF PIOCTLIST */
3097 #endif /* NEW_PROC_API */
3098 #endif /* SOL 2.5 PIOCLSTATUS */
3100 /* Given a pointer to a function, call that function once for each lwp
3101 in the procinfo list, until the function returns non-zero, in which
3102 event return the value returned by the function.
3104 Note: this function does NOT call update_threads. If you want to
3105 discover new threads first, you must call that function explicitly.
3106 This function just makes a quick pass over the currently-known
3109 PI is the parent process procinfo. FUNC is the per-thread
3110 function. PTR is an opaque parameter for function. Returns the
3111 first non-zero return value from the callee, or zero. */
3114 proc_iterate_over_threads (procinfo *pi,
3115 int (*func) (procinfo *, procinfo *, void *),
3118 procinfo *thread, *next;
3121 /* We should never have to apply this operation to any procinfo
3122 except the one for the main process. If that ever changes for
3123 any reason, then take out the following clause and replace it
3124 with one that makes sure the ctl_fd is open. */
3127 pi = find_procinfo_or_die (pi->pid, 0);
3129 for (thread = pi->thread_list; thread != NULL; thread = next)
3131 next = thread->next; /* In case thread is destroyed. */
3132 if ((retval = (*func) (pi, thread, ptr)) != 0)
3139 /* =================== END, Thread "MODULE" =================== */
3141 /* =================== END, /proc "MODULE" =================== */
3143 /* =================== GDB "MODULE" =================== */
3145 /* Here are all of the gdb target vector functions and their
3148 static ptid_t do_attach (ptid_t ptid);
3149 static void do_detach (int signo);
3150 static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum,
3151 int entry_or_exit, int mode, int from_tty);
3153 /* On mips-irix, we need to insert a breakpoint at __dbx_link during
3154 the startup phase. The following two variables are used to record
3155 the address of the breakpoint, and the code that was replaced by
3157 static int dbx_link_bpt_addr = 0;
3158 static void *dbx_link_bpt;
3160 /* Sets up the inferior to be debugged. Registers to trace signals,
3161 hardware faults, and syscalls. Note: does not set RLC flag: caller
3162 may want to customize that. Returns zero for success (note!
3163 unlike most functions in this module); on failure, returns the LINE
3164 NUMBER where it failed! */
3167 procfs_debug_inferior (procinfo *pi)
3169 fltset_t traced_faults;
3170 gdb_sigset_t traced_signals;
3171 sysset_t *traced_syscall_entries;
3172 sysset_t *traced_syscall_exits;
3175 #ifdef PROCFS_DONT_TRACE_FAULTS
3176 /* On some systems (OSF), we don't trace hardware faults.
3177 Apparently it's enough that we catch them as signals.
3178 Wonder why we don't just do that in general? */
3179 premptyset (&traced_faults); /* don't trace faults. */
3181 /* Register to trace hardware faults in the child. */
3182 prfillset (&traced_faults); /* trace all faults... */
3183 gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */
3185 if (!proc_set_traced_faults (pi, &traced_faults))
3188 /* Initially, register to trace all signals in the child. */
3189 prfillset (&traced_signals);
3190 if (!proc_set_traced_signals (pi, &traced_signals))
3194 /* Register to trace the 'exit' system call (on entry). */
3195 traced_syscall_entries = sysset_t_alloc (pi);
3196 gdb_premptysysset (traced_syscall_entries);
3198 gdb_praddsysset (traced_syscall_entries, SYS_exit);
3201 gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */
3204 gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit);
3206 #ifdef DYNAMIC_SYSCALLS
3208 int callnum = find_syscall (pi, "_exit");
3211 gdb_praddsysset (traced_syscall_entries, callnum);
3215 status = proc_set_traced_sysentry (pi, traced_syscall_entries);
3216 xfree (traced_syscall_entries);
3220 #ifdef PRFS_STOPEXEC /* defined on OSF */
3221 /* OSF method for tracing exec syscalls. Quoting:
3222 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
3223 exits from exec system calls because of the user level loader. */
3224 /* FIXME: make nice and maybe move into an access function. */
3228 if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
3231 prfs_flags |= PRFS_STOPEXEC;
3233 if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
3236 #else /* not PRFS_STOPEXEC */
3237 /* Everyone else's (except OSF) method for tracing exec syscalls. */
3239 Not all systems with /proc have all the exec* syscalls with the same
3240 names. On the SGI, for example, there is no SYS_exec, but there
3241 *is* a SYS_execv. So, we try to account for that. */
3243 traced_syscall_exits = sysset_t_alloc (pi);
3244 gdb_premptysysset (traced_syscall_exits);
3246 gdb_praddsysset (traced_syscall_exits, SYS_exec);
3249 gdb_praddsysset (traced_syscall_exits, SYS_execve);
3252 gdb_praddsysset (traced_syscall_exits, SYS_execv);
3255 #ifdef SYS_lwpcreate
3256 gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate);
3257 gdb_praddsysset (traced_syscall_exits, SYS_lwpexit);
3260 #ifdef SYS_lwp_create /* FIXME: once only, please. */
3261 gdb_praddsysset (traced_syscall_exits, SYS_lwp_create);
3262 gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit);
3265 #ifdef DYNAMIC_SYSCALLS
3267 int callnum = find_syscall (pi, "execve");
3270 gdb_praddsysset (traced_syscall_exits, callnum);
3271 callnum = find_syscall (pi, "ra_execve");
3273 gdb_praddsysset (traced_syscall_exits, callnum);
3277 status = proc_set_traced_sysexit (pi, traced_syscall_exits);
3278 xfree (traced_syscall_exits);
3282 #endif /* PRFS_STOPEXEC */
3287 procfs_attach (struct target_ops *ops, char *args, int from_tty)
3292 pid = parse_pid_to_attach (args);
3294 if (pid == getpid ())
3295 error (_("Attaching GDB to itself is not a good idea..."));
3299 exec_file = get_exec_file (0);
3302 printf_filtered (_("Attaching to program `%s', %s\n"),
3303 exec_file, target_pid_to_str (pid_to_ptid (pid)));
3305 printf_filtered (_("Attaching to %s\n"),
3306 target_pid_to_str (pid_to_ptid (pid)));
3310 inferior_ptid = do_attach (pid_to_ptid (pid));
3315 procfs_detach (struct target_ops *ops, char *args, int from_tty)
3318 int pid = PIDGET (inferior_ptid);
3327 exec_file = get_exec_file (0);
3328 if (exec_file == NULL)
3331 printf_filtered (_("Detaching from program: %s, %s\n"), exec_file,
3332 target_pid_to_str (pid_to_ptid (pid)));
3333 gdb_flush (gdb_stdout);
3338 inferior_ptid = null_ptid;
3339 detach_inferior (pid);
3340 unpush_target (ops);
3344 do_attach (ptid_t ptid)
3347 struct inferior *inf;
3351 if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL)
3352 perror (_("procfs: out of memory in 'attach'"));
3354 if (!open_procinfo_files (pi, FD_CTL))
3356 fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__);
3357 sprintf (errmsg, "do_attach: couldn't open /proc file for process %d",
3359 dead_procinfo (pi, errmsg, NOKILL);
3362 /* Stop the process (if it isn't already stopped). */
3363 if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
3365 pi->was_stopped = 1;
3366 proc_prettyprint_why (proc_why (pi), proc_what (pi), 1);
3370 pi->was_stopped = 0;
3371 /* Set the process to run again when we close it. */
3372 if (!proc_set_run_on_last_close (pi))
3373 dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL);
3375 /* Now stop the process. */
3376 if (!proc_stop_process (pi))
3377 dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL);
3378 pi->ignore_next_sigstop = 1;
3380 /* Save some of the /proc state to be restored if we detach. */
3381 if (!proc_get_traced_faults (pi, &pi->saved_fltset))
3382 dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL);
3383 if (!proc_get_traced_signals (pi, &pi->saved_sigset))
3384 dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL);
3385 if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
3386 dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.",
3388 if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
3389 dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.",
3391 if (!proc_get_held_signals (pi, &pi->saved_sighold))
3392 dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL);
3394 if ((fail = procfs_debug_inferior (pi)) != 0)
3395 dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL);
3397 inf = current_inferior ();
3398 inferior_appeared (inf, pi->pid);
3399 /* Let GDB know that the inferior was attached. */
3400 inf->attach_flag = 1;
3402 /* Create a procinfo for the current lwp. */
3403 lwpid = proc_get_current_thread (pi);
3404 create_procinfo (pi->pid, lwpid);
3406 /* Add it to gdb's thread list. */
3407 ptid = MERGEPID (pi->pid, lwpid);
3414 do_detach (int signo)
3418 /* Find procinfo for the main process. */
3419 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */
3421 if (!proc_set_current_signal (pi, signo))
3422 proc_warn (pi, "do_detach, set_current_signal", __LINE__);
3424 if (!proc_set_traced_signals (pi, &pi->saved_sigset))
3425 proc_warn (pi, "do_detach, set_traced_signal", __LINE__);
3427 if (!proc_set_traced_faults (pi, &pi->saved_fltset))
3428 proc_warn (pi, "do_detach, set_traced_faults", __LINE__);
3430 if (!proc_set_traced_sysentry (pi, pi->saved_entryset))
3431 proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__);
3433 if (!proc_set_traced_sysexit (pi, pi->saved_exitset))
3434 proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__);
3436 if (!proc_set_held_signals (pi, &pi->saved_sighold))
3437 proc_warn (pi, "do_detach, set_held_signals", __LINE__);
3439 if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)))
3440 if (signo || !(pi->was_stopped) ||
3441 query (_("Was stopped when attached, make it runnable again? ")))
3443 /* Clear any pending signal. */
3444 if (!proc_clear_current_fault (pi))
3445 proc_warn (pi, "do_detach, clear_current_fault", __LINE__);
3447 if (signo == 0 && !proc_clear_current_signal (pi))
3448 proc_warn (pi, "do_detach, clear_current_signal", __LINE__);
3450 if (!proc_set_run_on_last_close (pi))
3451 proc_warn (pi, "do_detach, set_rlc", __LINE__);
3454 destroy_procinfo (pi);
3457 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
3460 ??? Is the following note still relevant? We can't get individual
3461 registers with the PT_GETREGS ptrace(2) request either, yet we
3462 don't bother with caching at all in that case.
3464 NOTE: Since the /proc interface cannot give us individual
3465 registers, we pay no attention to REGNUM, and just fetch them all.
3466 This results in the possibility that we will do unnecessarily many
3467 fetches, since we may be called repeatedly for individual
3468 registers. So we cache the results, and mark the cache invalid
3469 when the process is resumed. */
3472 procfs_fetch_registers (struct target_ops *ops,
3473 struct regcache *regcache, int regnum)
3475 gdb_gregset_t *gregs;
3477 int pid = PIDGET (inferior_ptid);
3478 int tid = TIDGET (inferior_ptid);
3479 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3481 pi = find_procinfo_or_die (pid, tid);
3484 error (_("procfs: fetch_registers failed to find procinfo for %s"),
3485 target_pid_to_str (inferior_ptid));
3487 gregs = proc_get_gregs (pi);
3489 proc_error (pi, "fetch_registers, get_gregs", __LINE__);
3491 supply_gregset (regcache, (const gdb_gregset_t *) gregs);
3493 if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
3495 gdb_fpregset_t *fpregs;
3497 if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
3498 || regnum == gdbarch_pc_regnum (gdbarch)
3499 || regnum == gdbarch_sp_regnum (gdbarch))
3500 return; /* Not a floating point register. */
3502 fpregs = proc_get_fpregs (pi);
3504 proc_error (pi, "fetch_registers, get_fpregs", __LINE__);
3506 supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs);
3510 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
3511 this for all registers.
3513 NOTE: Since the /proc interface will not read individual registers,
3514 we will cache these requests until the process is resumed, and only
3515 then write them back to the inferior process.
3517 FIXME: is that a really bad idea? Have to think about cases where
3518 writing one register might affect the value of others, etc. */
3521 procfs_store_registers (struct target_ops *ops,
3522 struct regcache *regcache, int regnum)
3524 gdb_gregset_t *gregs;
3526 int pid = PIDGET (inferior_ptid);
3527 int tid = TIDGET (inferior_ptid);
3528 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3530 pi = find_procinfo_or_die (pid, tid);
3533 error (_("procfs: store_registers: failed to find procinfo for %s"),
3534 target_pid_to_str (inferior_ptid));
3536 gregs = proc_get_gregs (pi);
3538 proc_error (pi, "store_registers, get_gregs", __LINE__);
3540 fill_gregset (regcache, gregs, regnum);
3541 if (!proc_set_gregs (pi))
3542 proc_error (pi, "store_registers, set_gregs", __LINE__);
3544 if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
3546 gdb_fpregset_t *fpregs;
3548 if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
3549 || regnum == gdbarch_pc_regnum (gdbarch)
3550 || regnum == gdbarch_sp_regnum (gdbarch))
3551 return; /* Not a floating point register. */
3553 fpregs = proc_get_fpregs (pi);
3555 proc_error (pi, "store_registers, get_fpregs", __LINE__);
3557 fill_fpregset (regcache, fpregs, regnum);
3558 if (!proc_set_fpregs (pi))
3559 proc_error (pi, "store_registers, set_fpregs", __LINE__);
3564 syscall_is_lwp_exit (procinfo *pi, int scall)
3567 if (scall == SYS_lwp_exit)
3571 if (scall == SYS_lwpexit)
3578 syscall_is_exit (procinfo *pi, int scall)
3581 if (scall == SYS_exit)
3584 #ifdef DYNAMIC_SYSCALLS
3585 if (find_syscall (pi, "_exit") == scall)
3592 syscall_is_exec (procinfo *pi, int scall)
3595 if (scall == SYS_exec)
3599 if (scall == SYS_execv)
3603 if (scall == SYS_execve)
3606 #ifdef DYNAMIC_SYSCALLS
3607 if (find_syscall (pi, "_execve"))
3609 if (find_syscall (pi, "ra_execve"))
3616 syscall_is_lwp_create (procinfo *pi, int scall)
3618 #ifdef SYS_lwp_create
3619 if (scall == SYS_lwp_create)
3622 #ifdef SYS_lwpcreate
3623 if (scall == SYS_lwpcreate)
3629 /* Remove the breakpoint that we inserted in __dbx_link().
3630 Does nothing if the breakpoint hasn't been inserted or has already
3634 remove_dbx_link_breakpoint (void)
3636 if (dbx_link_bpt_addr == 0)
3639 if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0)
3640 warning (_("Unable to remove __dbx_link breakpoint."));
3642 dbx_link_bpt_addr = 0;
3643 dbx_link_bpt = NULL;
3647 /* Return the address of the __dbx_link() function in the file
3648 refernced by ABFD by scanning its symbol table. Return 0 if
3649 the symbol was not found. */
3652 dbx_link_addr (bfd *abfd)
3654 long storage_needed;
3655 asymbol **symbol_table;
3656 long number_of_symbols;
3659 storage_needed = bfd_get_symtab_upper_bound (abfd);
3660 if (storage_needed <= 0)
3663 symbol_table = (asymbol **) xmalloc (storage_needed);
3664 make_cleanup (xfree, symbol_table);
3666 number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
3668 for (i = 0; i < number_of_symbols; i++)
3670 asymbol *sym = symbol_table[i];
3672 if ((sym->flags & BSF_GLOBAL)
3673 && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0)
3674 return (sym->value + sym->section->vma);
3677 /* Symbol not found, return NULL. */
3681 /* Search the symbol table of the file referenced by FD for a symbol
3682 named __dbx_link(). If found, then insert a breakpoint at this location,
3683 and return nonzero. Return zero otherwise. */
3686 insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored)
3689 long storage_needed;
3692 abfd = bfd_fdopenr ("unamed", 0, fd);
3695 warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ()));
3699 if (!bfd_check_format (abfd, bfd_object))
3701 /* Not the correct format, so we can not possibly find the dbx_link
3707 sym_addr = dbx_link_addr (abfd);
3710 /* Insert the breakpoint. */
3711 dbx_link_bpt_addr = sym_addr;
3712 dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL,
3714 if (dbx_link_bpt == NULL)
3716 warning (_("Failed to insert dbx_link breakpoint."));
3728 /* Calls the supplied callback function once for each mapped address
3729 space in the process. The callback function receives an open file
3730 descriptor for the file corresponding to that mapped address space
3731 (if there is one), and the base address of the mapped space. Quit
3732 when the callback function returns a nonzero value, or at teh end
3733 of the mappings. Returns the first non-zero return value of the
3734 callback function, or zero. */
3737 solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR),
3740 procinfo *pi = data;
3744 char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)];
3746 if (map->pr_vaddr == 0 && map->pr_size == 0)
3747 return -1; /* sanity */
3749 if (map->pr_mapname[0] == 0)
3751 fd = -1; /* no map file */
3755 sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname);
3756 /* Note: caller's responsibility to close this fd! */
3757 fd = open_with_retry (name, O_RDONLY);
3758 /* Note: we don't test the above call for failure;
3759 we just pass the FD on as given. Sometimes there is
3760 no file, so the open may return failure, but that's
3764 fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr);
3765 /* Note: we don't test the above call for failure;
3766 we just pass the FD on as given. Sometimes there is
3767 no file, so the ioctl may return failure, but that's
3770 return (*func) (fd, (CORE_ADDR) map->pr_vaddr);
3773 /* If the given memory region MAP contains a symbol named __dbx_link,
3774 insert a breakpoint at this location and return nonzero. Return
3778 insert_dbx_link_bpt_in_region (struct prmap *map,
3779 find_memory_region_ftype child_func,
3782 procinfo *pi = (procinfo *) data;
3784 /* We know the symbol we're looking for is in a text region, so
3785 only look for it if the region is a text one. */
3786 if (map->pr_mflags & MA_EXEC)
3787 return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi);
3792 /* Search all memory regions for a symbol named __dbx_link. If found,
3793 insert a breakpoint at its location, and return nonzero. Return zero
3797 insert_dbx_link_breakpoint (procinfo *pi)
3799 return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region);
3803 /* Retrieve the next stop event from the child process. If child has
3804 not stopped yet, wait for it to stop. Translate /proc eventcodes
3805 (or possibly wait eventcodes) into gdb internal event codes.
3806 Returns the id of process (and possibly thread) that incurred the
3807 event. Event codes are returned through a pointer parameter. */
3810 procfs_wait (struct target_ops *ops,
3811 ptid_t ptid, struct target_waitstatus *status, int options)
3813 /* First cut: loosely based on original version 2.1. */
3817 ptid_t retval, temp_ptid;
3818 int why, what, flags;
3825 retval = pid_to_ptid (-1);
3827 /* Find procinfo for main process. */
3828 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
3831 /* We must assume that the status is stale now... */
3832 pi->status_valid = 0;
3833 pi->gregs_valid = 0;
3834 pi->fpregs_valid = 0;
3836 #if 0 /* just try this out... */
3837 flags = proc_flags (pi);
3838 why = proc_why (pi);
3839 if ((flags & PR_STOPPED) && (why == PR_REQUESTED))
3840 pi->status_valid = 0; /* re-read again, IMMEDIATELY... */
3842 /* If child is not stopped, wait for it to stop. */
3843 if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) &&
3844 !proc_wait_for_stop (pi))
3846 /* wait_for_stop failed: has the child terminated? */
3847 if (errno == ENOENT)
3851 /* /proc file not found; presumably child has terminated. */
3852 wait_retval = wait (&wstat); /* "wait" for the child's exit. */
3854 if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */
3855 error (_("procfs: couldn't stop "
3856 "process %d: wait returned %d."),
3857 PIDGET (inferior_ptid), wait_retval);
3858 /* FIXME: might I not just use waitpid?
3859 Or try find_procinfo to see if I know about this child? */
3860 retval = pid_to_ptid (wait_retval);
3862 else if (errno == EINTR)
3866 /* Unknown error from wait_for_stop. */
3867 proc_error (pi, "target_wait (wait_for_stop)", __LINE__);
3872 /* This long block is reached if either:
3873 a) the child was already stopped, or
3874 b) we successfully waited for the child with wait_for_stop.
3875 This block will analyze the /proc status, and translate it
3876 into a waitstatus for GDB.
3878 If we actually had to call wait because the /proc file
3879 is gone (child terminated), then we skip this block,
3880 because we already have a waitstatus. */
3882 flags = proc_flags (pi);
3883 why = proc_why (pi);
3884 what = proc_what (pi);
3886 if (flags & (PR_STOPPED | PR_ISTOP))
3889 /* If it's running async (for single_thread control),
3890 set it back to normal again. */
3891 if (flags & PR_ASYNC)
3892 if (!proc_unset_async (pi))
3893 proc_error (pi, "target_wait, unset_async", __LINE__);
3897 proc_prettyprint_why (why, what, 1);
3899 /* The 'pid' we will return to GDB is composed of
3900 the process ID plus the lwp ID. */
3901 retval = MERGEPID (pi->pid, proc_get_current_thread (pi));
3905 wstat = (what << 8) | 0177;
3908 if (syscall_is_lwp_exit (pi, what))
3910 if (print_thread_events)
3911 printf_unfiltered (_("[%s exited]\n"),
3912 target_pid_to_str (retval));
3913 delete_thread (retval);
3914 status->kind = TARGET_WAITKIND_SPURIOUS;
3917 else if (syscall_is_exit (pi, what))
3919 struct inferior *inf;
3921 /* Handle SYS_exit call only. */
3922 /* Stopped at entry to SYS_exit.
3923 Make it runnable, resume it, then use
3924 the wait system call to get its exit code.
3925 Proc_run_process always clears the current
3927 Then return its exit status. */
3928 pi->status_valid = 0;
3930 /* FIXME: what we should do is return
3931 TARGET_WAITKIND_SPURIOUS. */
3932 if (!proc_run_process (pi, 0, 0))
3933 proc_error (pi, "target_wait, run_process", __LINE__);
3935 inf = find_inferior_pid (pi->pid);
3936 if (inf->attach_flag)
3938 /* Don't call wait: simulate waiting for exit,
3939 return a "success" exit code. Bogus: what if
3940 it returns something else? */
3942 retval = inferior_ptid; /* ? ? ? */
3946 int temp = wait (&wstat);
3948 /* FIXME: shouldn't I make sure I get the right
3949 event from the right process? If (for
3950 instance) I have killed an earlier inferior
3951 process but failed to clean up after it
3952 somehow, I could get its termination event
3955 /* If wait returns -1, that's what we return
3958 retval = pid_to_ptid (temp);
3963 printf_filtered (_("procfs: trapped on entry to "));
3964 proc_prettyprint_syscall (proc_what (pi), 0);
3965 printf_filtered ("\n");
3968 long i, nsysargs, *sysargs;
3970 if ((nsysargs = proc_nsysarg (pi)) > 0 &&
3971 (sysargs = proc_sysargs (pi)) != NULL)
3973 printf_filtered (_("%ld syscall arguments:\n"),
3975 for (i = 0; i < nsysargs; i++)
3976 printf_filtered ("#%ld: 0x%08lx\n",
3984 /* How to exit gracefully, returning "unknown
3986 status->kind = TARGET_WAITKIND_SPURIOUS;
3987 return inferior_ptid;
3991 /* How to keep going without returning to wfi: */
3992 target_resume (ptid, 0, TARGET_SIGNAL_0);
3998 if (syscall_is_exec (pi, what))
4000 /* Hopefully this is our own "fork-child" execing
4001 the real child. Hoax this event into a trap, and
4002 GDB will see the child about to execute its start
4004 wstat = (SIGTRAP << 8) | 0177;
4007 else if (what == SYS_syssgi)
4009 /* see if we can break on dbx_link(). If yes, then
4010 we no longer need the SYS_syssgi notifications. */
4011 if (insert_dbx_link_breakpoint (pi))
4012 proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT,
4015 /* This is an internal event and should be transparent
4016 to wfi, so resume the execution and wait again. See
4017 comment in procfs_init_inferior() for more details. */
4018 target_resume (ptid, 0, TARGET_SIGNAL_0);
4022 else if (syscall_is_lwp_create (pi, what))
4024 /* This syscall is somewhat like fork/exec. We
4025 will get the event twice: once for the parent
4026 LWP, and once for the child. We should already
4027 know about the parent LWP, but the child will
4028 be new to us. So, whenever we get this event,
4029 if it represents a new thread, simply add the
4030 thread to the list. */
4032 /* If not in procinfo list, add it. */
4033 temp_tid = proc_get_current_thread (pi);
4034 if (!find_procinfo (pi->pid, temp_tid))
4035 create_procinfo (pi->pid, temp_tid);
4037 temp_ptid = MERGEPID (pi->pid, temp_tid);
4038 /* If not in GDB's thread list, add it. */
4039 if (!in_thread_list (temp_ptid))
4040 add_thread (temp_ptid);
4042 /* Return to WFI, but tell it to immediately resume. */
4043 status->kind = TARGET_WAITKIND_SPURIOUS;
4044 return inferior_ptid;
4046 else if (syscall_is_lwp_exit (pi, what))
4048 if (print_thread_events)
4049 printf_unfiltered (_("[%s exited]\n"),
4050 target_pid_to_str (retval));
4051 delete_thread (retval);
4052 status->kind = TARGET_WAITKIND_SPURIOUS;
4057 /* FIXME: Do we need to handle SYS_sproc,
4058 SYS_fork, or SYS_vfork here? The old procfs
4059 seemed to use this event to handle threads on
4060 older (non-LWP) systems, where I'm assuming
4061 that threads were actually separate processes.
4062 Irix, maybe? Anyway, low priority for now. */
4066 printf_filtered (_("procfs: trapped on exit from "));
4067 proc_prettyprint_syscall (proc_what (pi), 0);
4068 printf_filtered ("\n");
4071 long i, nsysargs, *sysargs;
4073 if ((nsysargs = proc_nsysarg (pi)) > 0 &&
4074 (sysargs = proc_sysargs (pi)) != NULL)
4076 printf_filtered (_("%ld syscall arguments:\n"),
4078 for (i = 0; i < nsysargs; i++)
4079 printf_filtered ("#%ld: 0x%08lx\n",
4084 status->kind = TARGET_WAITKIND_SPURIOUS;
4085 return inferior_ptid;
4090 wstat = (SIGSTOP << 8) | 0177;
4095 printf_filtered (_("Retry #%d:\n"), retry);
4096 pi->status_valid = 0;
4101 /* If not in procinfo list, add it. */
4102 temp_tid = proc_get_current_thread (pi);
4103 if (!find_procinfo (pi->pid, temp_tid))
4104 create_procinfo (pi->pid, temp_tid);
4106 /* If not in GDB's thread list, add it. */
4107 temp_ptid = MERGEPID (pi->pid, temp_tid);
4108 if (!in_thread_list (temp_ptid))
4109 add_thread (temp_ptid);
4111 status->kind = TARGET_WAITKIND_STOPPED;
4112 status->value.sig = 0;
4117 wstat = (what << 8) | 0177;
4123 wstat = (SIGTRAP << 8) | 0177;
4128 wstat = (SIGTRAP << 8) | 0177;
4131 /* FIXME: use si_signo where possible. */
4133 #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */
4136 wstat = (SIGILL << 8) | 0177;
4139 #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */
4142 /* If we hit our __dbx_link() internal breakpoint,
4143 then remove it. See comments in procfs_init_inferior()
4144 for more details. */
4145 if (dbx_link_bpt_addr != 0
4146 && dbx_link_bpt_addr
4147 == regcache_read_pc (get_current_regcache ()))
4148 remove_dbx_link_breakpoint ();
4150 wstat = (SIGTRAP << 8) | 0177;
4154 #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */
4157 wstat = (SIGSEGV << 8) | 0177;
4161 #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */
4164 wstat = (SIGFPE << 8) | 0177;
4166 case FLTPAGE: /* Recoverable page fault */
4167 default: /* FIXME: use si_signo if possible for
4169 retval = pid_to_ptid (-1);
4170 printf_filtered ("procfs:%d -- ", __LINE__);
4171 printf_filtered (_("child stopped for unknown reason:\n"));
4172 proc_prettyprint_why (why, what, 1);
4173 error (_("... giving up..."));
4176 break; /* case PR_FAULTED: */
4177 default: /* switch (why) unmatched */
4178 printf_filtered ("procfs:%d -- ", __LINE__);
4179 printf_filtered (_("child stopped for unknown reason:\n"));
4180 proc_prettyprint_why (why, what, 1);
4181 error (_("... giving up..."));
4184 /* Got this far without error: If retval isn't in the
4185 threads database, add it. */
4186 if (PIDGET (retval) > 0 &&
4187 !ptid_equal (retval, inferior_ptid) &&
4188 !in_thread_list (retval))
4190 /* We have a new thread. We need to add it both to
4191 GDB's list and to our own. If we don't create a
4192 procinfo, resume may be unhappy later. */
4193 add_thread (retval);
4194 if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL)
4195 create_procinfo (PIDGET (retval), TIDGET (retval));
4198 else /* Flags do not indicate STOPPED. */
4200 /* surely this can't happen... */
4201 printf_filtered ("procfs:%d -- process not stopped.\n",
4203 proc_prettyprint_flags (flags, 1);
4204 error (_("procfs: ...giving up..."));
4209 store_waitstatus (status, wstat);
4215 /* Perform a partial transfer to/from the specified object. For
4216 memory transfers, fall back to the old memory xfer functions. */
4219 procfs_xfer_partial (struct target_ops *ops, enum target_object object,
4220 const char *annex, gdb_byte *readbuf,
4221 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
4225 case TARGET_OBJECT_MEMORY:
4227 return (*ops->deprecated_xfer_memory) (offset, readbuf,
4228 len, 0/*read*/, NULL, ops);
4230 return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf,
4231 len, 1/*write*/, NULL, ops);
4235 case TARGET_OBJECT_AUXV:
4236 return memory_xfer_auxv (ops, object, annex, readbuf, writebuf,
4241 if (ops->beneath != NULL)
4242 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
4243 readbuf, writebuf, offset, len);
4249 /* Transfer LEN bytes between GDB address MYADDR and target address
4250 MEMADDR. If DOWRITE is non-zero, transfer them to the target,
4251 otherwise transfer them from the target. TARGET is unused.
4253 The return value is 0 if an error occurred or no bytes were
4254 transferred. Otherwise, it will be a positive value which
4255 indicates the number of bytes transferred between gdb and the
4256 target. (Note that the interface also makes provisions for
4257 negative values, but this capability isn't implemented here.) */
4260 procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite,
4261 struct mem_attrib *attrib, struct target_ops *target)
4266 /* Find procinfo for main process. */
4267 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
4268 if (pi->as_fd == 0 &&
4269 open_procinfo_files (pi, FD_AS) == 0)
4271 proc_warn (pi, "xfer_memory, open_proc_files", __LINE__);
4275 if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
4280 PROCFS_NOTE ("write memory:\n");
4282 PROCFS_NOTE ("write memory:\n");
4284 nbytes = write (pi->as_fd, myaddr, len);
4288 PROCFS_NOTE ("read memory:\n");
4289 nbytes = read (pi->as_fd, myaddr, len);
4299 /* Called by target_resume before making child runnable. Mark cached
4300 registers and status's invalid. If there are "dirty" caches that
4301 need to be written back to the child process, do that.
4303 File descriptors are also cached. As they are a limited resource,
4304 we cannot hold onto them indefinitely. However, as they are
4305 expensive to open, we don't want to throw them away
4306 indescriminately either. As a compromise, we will keep the file
4307 descriptors for the parent process, but discard any file
4308 descriptors we may have accumulated for the threads.
4310 As this function is called by iterate_over_threads, it always
4311 returns zero (so that iterate_over_threads will keep
4315 invalidate_cache (procinfo *parent, procinfo *pi, void *ptr)
4317 /* About to run the child; invalidate caches and do any other
4321 if (pi->gregs_dirty)
4322 if (parent == NULL ||
4323 proc_get_current_thread (parent) != pi->tid)
4324 if (!proc_set_gregs (pi)) /* flush gregs cache */
4325 proc_warn (pi, "target_resume, set_gregs",
4327 if (gdbarch_fp0_regnum (target_gdbarch) >= 0)
4328 if (pi->fpregs_dirty)
4329 if (parent == NULL ||
4330 proc_get_current_thread (parent) != pi->tid)
4331 if (!proc_set_fpregs (pi)) /* flush fpregs cache */
4332 proc_warn (pi, "target_resume, set_fpregs",
4338 /* The presence of a parent indicates that this is an LWP.
4339 Close any file descriptors that it might have open.
4340 We don't do this to the master (parent) procinfo. */
4342 close_procinfo_files (pi);
4344 pi->gregs_valid = 0;
4345 pi->fpregs_valid = 0;
4347 pi->gregs_dirty = 0;
4348 pi->fpregs_dirty = 0;
4350 pi->status_valid = 0;
4351 pi->threads_valid = 0;
4357 /* A callback function for iterate_over_threads. Find the
4358 asynchronous signal thread, and make it runnable. See if that
4359 helps matters any. */
4362 make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr)
4365 if (proc_flags (pi) & PR_ASLWP)
4367 if (!proc_run_process (pi, 0, -1))
4368 proc_error (pi, "make_signal_thread_runnable", __LINE__);
4376 /* Make the child process runnable. Normally we will then call
4377 procfs_wait and wait for it to stop again (unless gdb is async).
4379 If STEP is true, then arrange for the child to stop again after
4380 executing a single instruction. If SIGNO is zero, then cancel any
4381 pending signal; if non-zero, then arrange for the indicated signal
4382 to be delivered to the child when it runs. If PID is -1, then
4383 allow any child thread to run; if non-zero, then allow only the
4384 indicated thread to run. (not implemented yet). */
4387 procfs_resume (struct target_ops *ops,
4388 ptid_t ptid, int step, enum target_signal signo)
4390 procinfo *pi, *thread;
4394 prrun.prflags |= PRSVADDR;
4395 prrun.pr_vaddr = $PC; set resume address
4396 prrun.prflags |= PRSTRACE; trace signals in pr_trace (all)
4397 prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE)
4398 prrun.prflags |= PRCFAULT; clear current fault.
4400 PRSTRACE and PRSFAULT can be done by other means
4401 (proc_trace_signals, proc_trace_faults)
4402 PRSVADDR is unnecessary.
4403 PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault)
4404 This basically leaves PRSTEP and PRCSIG.
4405 PRCSIG is like PIOCSSIG (proc_clear_current_signal).
4406 So basically PR_STEP is the sole argument that must be passed
4407 to proc_run_process (for use in the prrun struct by ioctl). */
4409 /* Find procinfo for main process. */
4410 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
4412 /* First cut: ignore pid argument. */
4415 /* Convert signal to host numbering. */
4417 (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop))
4420 native_signo = target_signal_to_host (signo);
4422 pi->ignore_next_sigstop = 0;
4424 /* Running the process voids all cached registers and status. */
4425 /* Void the threads' caches first. */
4426 proc_iterate_over_threads (pi, invalidate_cache, NULL);
4427 /* Void the process procinfo's caches. */
4428 invalidate_cache (NULL, pi, NULL);
4430 if (PIDGET (ptid) != -1)
4432 /* Resume a specific thread, presumably suppressing the
4434 thread = find_procinfo (PIDGET (ptid), TIDGET (ptid));
4437 if (thread->tid != 0)
4439 /* We're to resume a specific thread, and not the
4440 others. Set the child process's PR_ASYNC flag. */
4442 if (!proc_set_async (pi))
4443 proc_error (pi, "target_resume, set_async", __LINE__);
4446 proc_iterate_over_threads (pi,
4447 make_signal_thread_runnable,
4450 pi = thread; /* Substitute the thread's procinfo
4456 if (!proc_run_process (pi, step, native_signo))
4459 warning (_("resume: target already running. "
4460 "Pretend to resume, and hope for the best!"));
4462 proc_error (pi, "target_resume", __LINE__);
4466 /* Set up to trace signals in the child process. */
4469 procfs_pass_signals (int numsigs, unsigned char *pass_signals)
4471 gdb_sigset_t signals;
4472 procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
4475 prfillset (&signals);
4477 for (signo = 0; signo < NSIG; signo++)
4479 int target_signo = target_signal_from_host (signo);
4480 if (target_signo < numsigs && pass_signals[target_signo])
4481 gdb_prdelset (&signals, signo);
4484 if (!proc_set_traced_signals (pi, &signals))
4485 proc_error (pi, "pass_signals", __LINE__);
4488 /* Print status information about the child process. */
4491 procfs_files_info (struct target_ops *ignore)
4493 struct inferior *inf = current_inferior ();
4495 printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"),
4496 inf->attach_flag? "attached": "child",
4497 target_pid_to_str (inferior_ptid));
4500 /* Stop the child process asynchronously, as when the gdb user types
4501 control-c or presses a "stop" button. Works by sending
4502 kill(SIGINT) to the child's process group. */
4505 procfs_stop (ptid_t ptid)
4507 kill (-inferior_process_group (), SIGINT);
4510 /* Make it die. Wait for it to die. Clean up after it. Note: this
4511 should only be applied to the real process, not to an LWP, because
4512 of the check for parent-process. If we need this to work for an
4513 LWP, it needs some more logic. */
4516 unconditionally_kill_inferior (procinfo *pi)
4520 parent_pid = proc_parent_pid (pi);
4521 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
4522 /* FIXME: use access functions. */
4523 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
4524 before the PIOCKILL, otherwise it might generate a corrupted core
4525 file for the inferior. */
4526 if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0)
4528 printf_filtered ("unconditionally_kill: SSIG failed!\n");
4531 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
4532 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
4533 to kill the inferior, otherwise it might remain stopped with a
4535 We do not check the result of the PIOCSSIG, the inferior might have
4538 gdb_siginfo_t newsiginfo;
4540 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
4541 newsiginfo.si_signo = SIGKILL;
4542 newsiginfo.si_code = 0;
4543 newsiginfo.si_errno = 0;
4544 newsiginfo.si_pid = getpid ();
4545 newsiginfo.si_uid = getuid ();
4546 /* FIXME: use proc_set_current_signal. */
4547 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
4549 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4550 if (!proc_kill (pi, SIGKILL))
4551 proc_error (pi, "unconditionally_kill, proc_kill", __LINE__);
4552 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4553 destroy_procinfo (pi);
4555 /* If pi is GDB's child, wait for it to die. */
4556 if (parent_pid == getpid ())
4557 /* FIXME: should we use waitpid to make sure we get the right event?
4558 Should we check the returned event? */
4563 ret = waitpid (pi->pid, &status, 0);
4570 /* We're done debugging it, and we want it to go away. Then we want
4571 GDB to forget all about it. */
4574 procfs_kill_inferior (struct target_ops *ops)
4576 if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */
4578 /* Find procinfo for main process. */
4579 procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0);
4582 unconditionally_kill_inferior (pi);
4583 target_mourn_inferior ();
4587 /* Forget we ever debugged this thing! */
4590 procfs_mourn_inferior (struct target_ops *ops)
4594 if (!ptid_equal (inferior_ptid, null_ptid))
4596 /* Find procinfo for main process. */
4597 pi = find_procinfo (PIDGET (inferior_ptid), 0);
4599 destroy_procinfo (pi);
4601 unpush_target (ops);
4603 if (dbx_link_bpt != NULL)
4605 deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt);
4606 dbx_link_bpt_addr = 0;
4607 dbx_link_bpt = NULL;
4610 generic_mourn_inferior ();
4613 /* When GDB forks to create a runnable inferior process, this function
4614 is called on the parent side of the fork. It's job is to do
4615 whatever is necessary to make the child ready to be debugged, and
4616 then wait for the child to synchronize. */
4619 procfs_init_inferior (struct target_ops *ops, int pid)
4622 gdb_sigset_t signals;
4626 /* This routine called on the parent side (GDB side)
4627 after GDB forks the inferior. */
4630 if ((pi = create_procinfo (pid, 0)) == NULL)
4631 perror (_("procfs: out of memory in 'init_inferior'"));
4633 if (!open_procinfo_files (pi, FD_CTL))
4634 proc_error (pi, "init_inferior, open_proc_files", __LINE__);
4638 open_procinfo_files // done
4641 procfs_notice_signals
4648 /* If not stopped yet, wait for it to stop. */
4649 if (!(proc_flags (pi) & PR_STOPPED) &&
4650 !(proc_wait_for_stop (pi)))
4651 dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL);
4653 /* Save some of the /proc state to be restored if we detach. */
4654 /* FIXME: Why? In case another debugger was debugging it?
4655 We're it's parent, for Ghu's sake! */
4656 if (!proc_get_traced_signals (pi, &pi->saved_sigset))
4657 proc_error (pi, "init_inferior, get_traced_signals", __LINE__);
4658 if (!proc_get_held_signals (pi, &pi->saved_sighold))
4659 proc_error (pi, "init_inferior, get_held_signals", __LINE__);
4660 if (!proc_get_traced_faults (pi, &pi->saved_fltset))
4661 proc_error (pi, "init_inferior, get_traced_faults", __LINE__);
4662 if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
4663 proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__);
4664 if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
4665 proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__);
4667 if ((fail = procfs_debug_inferior (pi)) != 0)
4668 proc_error (pi, "init_inferior (procfs_debug_inferior)", fail);
4670 /* FIXME: logically, we should really be turning OFF run-on-last-close,
4671 and possibly even turning ON kill-on-last-close at this point. But
4672 I can't make that change without careful testing which I don't have
4673 time to do right now... */
4674 /* Turn on run-on-last-close flag so that the child
4675 will die if GDB goes away for some reason. */
4676 if (!proc_set_run_on_last_close (pi))
4677 proc_error (pi, "init_inferior, set_RLC", __LINE__);
4679 /* We now have have access to the lwpid of the main thread/lwp. */
4680 lwpid = proc_get_current_thread (pi);
4682 /* Create a procinfo for the main lwp. */
4683 create_procinfo (pid, lwpid);
4685 /* We already have a main thread registered in the thread table at
4686 this point, but it didn't have any lwp info yet. Notify the core
4687 about it. This changes inferior_ptid as well. */
4688 thread_change_ptid (pid_to_ptid (pid),
4689 MERGEPID (pid, lwpid));
4691 /* Typically two, one trap to exec the shell, one to exec the
4692 program being debugged. Defined by "inferior.h". */
4693 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
4696 /* On mips-irix, we need to stop the inferior early enough during
4697 the startup phase in order to be able to load the shared library
4698 symbols and insert the breakpoints that are located in these shared
4699 libraries. Stopping at the program entry point is not good enough
4700 because the -init code is executed before the execution reaches
4703 So what we need to do is to insert a breakpoint in the runtime
4704 loader (rld), more precisely in __dbx_link(). This procedure is
4705 called by rld once all shared libraries have been mapped, but before
4706 the -init code is executed. Unfortuantely, this is not straightforward,
4707 as rld is not part of the executable we are running, and thus we need
4708 the inferior to run until rld itself has been mapped in memory.
4710 For this, we trace all syssgi() syscall exit events. Each time
4711 we detect such an event, we iterate over each text memory maps,
4712 get its associated fd, and scan the symbol table for __dbx_link().
4713 When found, we know that rld has been mapped, and that we can insert
4714 the breakpoint at the symbol address. Once the dbx_link() breakpoint
4715 has been inserted, the syssgi() notifications are no longer necessary,
4716 so they should be canceled. */
4717 proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0);
4721 /* When GDB forks to create a new process, this function is called on
4722 the child side of the fork before GDB exec's the user program. Its
4723 job is to make the child minimally debuggable, so that the parent
4724 GDB process can connect to the child and take over. This function
4725 should do only the minimum to make that possible, and to
4726 synchronize with the parent process. The parent process should
4727 take care of the details. */
4730 procfs_set_exec_trap (void)
4732 /* This routine called on the child side (inferior side)
4733 after GDB forks the inferior. It must use only local variables,
4734 because it may be sharing data space with its parent. */
4739 if ((pi = create_procinfo (getpid (), 0)) == NULL)
4740 perror_with_name (_("procfs: create_procinfo failed in child."));
4742 if (open_procinfo_files (pi, FD_CTL) == 0)
4744 proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__);
4745 gdb_flush (gdb_stderr);
4746 /* No need to call "dead_procinfo", because we're going to
4751 #ifdef PRFS_STOPEXEC /* defined on OSF */
4752 /* OSF method for tracing exec syscalls. Quoting:
4753 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
4754 exits from exec system calls because of the user level loader. */
4755 /* FIXME: make nice and maybe move into an access function. */
4759 if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
4761 proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__);
4762 gdb_flush (gdb_stderr);
4765 prfs_flags |= PRFS_STOPEXEC;
4767 if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
4769 proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__);
4770 gdb_flush (gdb_stderr);
4774 #else /* not PRFS_STOPEXEC */
4775 /* Everyone else's (except OSF) method for tracing exec syscalls. */
4777 Not all systems with /proc have all the exec* syscalls with the same
4778 names. On the SGI, for example, there is no SYS_exec, but there
4779 *is* a SYS_execv. So, we try to account for that. */
4781 exitset = sysset_t_alloc (pi);
4782 gdb_premptysysset (exitset);
4784 gdb_praddsysset (exitset, SYS_exec);
4787 gdb_praddsysset (exitset, SYS_execve);
4790 gdb_praddsysset (exitset, SYS_execv);
4792 #ifdef DYNAMIC_SYSCALLS
4794 int callnum = find_syscall (pi, "execve");
4797 gdb_praddsysset (exitset, callnum);
4799 callnum = find_syscall (pi, "ra_execve");
4801 gdb_praddsysset (exitset, callnum);
4803 #endif /* DYNAMIC_SYSCALLS */
4805 if (!proc_set_traced_sysexit (pi, exitset))
4807 proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__);
4808 gdb_flush (gdb_stderr);
4811 #endif /* PRFS_STOPEXEC */
4813 /* FIXME: should this be done in the parent instead? */
4814 /* Turn off inherit on fork flag so that all grand-children
4815 of gdb start with tracing flags cleared. */
4816 if (!proc_unset_inherit_on_fork (pi))
4817 proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__);
4819 /* Turn off run on last close flag, so that the child process
4820 cannot run away just because we close our handle on it.
4821 We want it to wait for the parent to attach. */
4822 if (!proc_unset_run_on_last_close (pi))
4823 proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__);
4825 /* FIXME: No need to destroy the procinfo --
4826 we have our own address space, and we're about to do an exec! */
4827 /*destroy_procinfo (pi);*/
4830 /* This function is called BEFORE gdb forks the inferior process. Its
4831 only real responsibility is to set things up for the fork, and tell
4832 GDB which two functions to call after the fork (one for the parent,
4833 and one for the child).
4835 This function does a complicated search for a unix shell program,
4836 which it then uses to parse arguments and environment variables to
4837 be sent to the child. I wonder whether this code could not be
4838 abstracted out and shared with other unix targets such as
4842 procfs_create_inferior (struct target_ops *ops, char *exec_file,
4843 char *allargs, char **env, int from_tty)
4845 char *shell_file = getenv ("SHELL");
4849 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
4852 /* We will be looking down the PATH to find shell_file. If we
4853 just do this the normal way (via execlp, which operates by
4854 attempting an exec for each element of the PATH until it
4855 finds one which succeeds), then there will be an exec for
4856 each failed attempt, each of which will cause a PR_SYSEXIT
4857 stop, and we won't know how to distinguish the PR_SYSEXIT's
4858 for these failed execs with the ones for successful execs
4859 (whether the exec has succeeded is stored at that time in the
4860 carry bit or some such architecture-specific and
4861 non-ABI-specified place).
4863 So I can't think of anything better than to search the PATH
4864 now. This has several disadvantages: (1) There is a race
4865 condition; if we find a file now and it is deleted before we
4866 exec it, we lose, even if the deletion leaves a valid file
4867 further down in the PATH, (2) there is no way to know exactly
4868 what an executable (in the sense of "capable of being
4869 exec'd") file is. Using access() loses because it may lose
4870 if the caller is the superuser; failing to use it loses if
4871 there are ACLs or some such. */
4875 /* FIXME-maybe: might want "set path" command so user can change what
4876 path is used from within GDB. */
4877 char *path = getenv ("PATH");
4879 struct stat statbuf;
4882 path = "/bin:/usr/bin";
4884 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
4885 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
4887 p1 = strchr (p, ':');
4892 strncpy (tryname, p, len);
4893 tryname[len] = '\0';
4894 strcat (tryname, "/");
4895 strcat (tryname, shell_file);
4896 if (access (tryname, X_OK) < 0)
4898 if (stat (tryname, &statbuf) < 0)
4900 if (!S_ISREG (statbuf.st_mode))
4901 /* We certainly need to reject directories. I'm not quite
4902 as sure about FIFOs, sockets, etc., but I kind of doubt
4903 that people want to exec() these things. */
4908 /* Not found. This must be an error rather than merely passing
4909 the file to execlp(), because execlp() would try all the
4910 exec()s, causing GDB to get confused. */
4911 error (_("procfs:%d -- Can't find shell %s in PATH"),
4912 __LINE__, shell_file);
4914 shell_file = tryname;
4917 pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap,
4918 NULL, NULL, shell_file, NULL);
4920 procfs_init_inferior (ops, pid);
4923 /* An observer for the "inferior_created" event. */
4926 procfs_inferior_created (struct target_ops *ops, int from_tty)
4929 /* Make sure to cancel the syssgi() syscall-exit notifications.
4930 They should normally have been removed by now, but they may still
4931 be activated if the inferior doesn't use shared libraries, or if
4932 we didn't locate __dbx_link, or if we never stopped in __dbx_link.
4933 See procfs_init_inferior() for more details.
4935 Since these notifications are only ever enabled when we spawned
4936 the inferior ourselves, there is nothing to do when the inferior
4937 was created by attaching to an already running process, or when
4938 debugging a core file. */
4939 if (current_inferior ()->attach_flag || !target_can_run (¤t_target))
4942 proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0),
4943 SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0);
4947 /* Callback for find_new_threads. Calls "add_thread". */
4950 procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr)
4952 ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid);
4954 if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid))
4955 add_thread (gdb_threadid);
4960 /* Query all the threads that the target knows about, and give them
4961 back to GDB to add to its list. */
4964 procfs_find_new_threads (struct target_ops *ops)
4968 /* Find procinfo for main process. */
4969 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
4970 proc_update_threads (pi);
4971 proc_iterate_over_threads (pi, procfs_notice_thread, NULL);
4974 /* Return true if the thread is still 'alive'. This guy doesn't
4975 really seem to be doing his job. Got to investigate how to tell
4976 when a thread is really gone. */
4979 procfs_thread_alive (struct target_ops *ops, ptid_t ptid)
4984 proc = PIDGET (ptid);
4985 thread = TIDGET (ptid);
4986 /* If I don't know it, it ain't alive! */
4987 if ((pi = find_procinfo (proc, thread)) == NULL)
4990 /* If I can't get its status, it ain't alive!
4991 What's more, I need to forget about it! */
4992 if (!proc_get_status (pi))
4994 destroy_procinfo (pi);
4997 /* I couldn't have got its status if it weren't alive, so it's
5002 /* Convert PTID to a string. Returns the string in a static
5006 procfs_pid_to_str (struct target_ops *ops, ptid_t ptid)
5008 static char buf[80];
5010 if (TIDGET (ptid) == 0)
5011 sprintf (buf, "process %d", PIDGET (ptid));
5013 sprintf (buf, "LWP %ld", TIDGET (ptid));
5018 /* Insert a watchpoint. */
5021 procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag,
5029 pi = find_procinfo_or_die (PIDGET (ptid) == -1 ?
5030 PIDGET (inferior_ptid) : PIDGET (ptid), 0);
5032 /* Translate from GDB's flags to /proc's. */
5033 if (len > 0) /* len == 0 means delete watchpoint. */
5035 switch (rwflag) { /* FIXME: need an enum! */
5036 case hw_write: /* default watchpoint (write) */
5037 pflags = WRITE_WATCHFLAG;
5039 case hw_read: /* read watchpoint */
5040 pflags = READ_WATCHFLAG;
5042 case hw_access: /* access watchpoint */
5043 pflags = READ_WATCHFLAG | WRITE_WATCHFLAG;
5045 case hw_execute: /* execution HW breakpoint */
5046 pflags = EXEC_WATCHFLAG;
5048 default: /* Something weird. Return error. */
5051 if (after) /* Stop after r/w access is completed. */
5052 pflags |= AFTER_WATCHFLAG;
5055 if (!proc_set_watchpoint (pi, addr, len, pflags))
5057 if (errno == E2BIG) /* Typical error for no resources. */
5058 return -1; /* fail */
5059 /* GDB may try to remove the same watchpoint twice.
5060 If a remove request returns no match, don't error. */
5061 if (errno == ESRCH && len == 0)
5062 return 0; /* ignore */
5063 proc_error (pi, "set_watchpoint", __LINE__);
5066 #endif /* UNIXWARE */
5070 /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE
5071 is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint,
5072 or bp_hardware_watchpoint. CNT is the number of watchpoints used so
5075 Note: procfs_can_use_hw_breakpoint() is not yet used by all
5076 procfs.c targets due to the fact that some of them still define
5077 target_can_use_hardware_watchpoint. */
5080 procfs_can_use_hw_breakpoint (int type, int cnt, int othertype)
5082 /* Due to the way that proc_set_watchpoint() is implemented, host
5083 and target pointers must be of the same size. If they are not,
5084 we can't use hardware watchpoints. This limitation is due to the
5085 fact that proc_set_watchpoint() calls
5086 procfs_address_to_host_pointer(); a close inspection of
5087 procfs_address_to_host_pointer will reveal that an internal error
5088 will be generated when the host and target pointer sizes are
5090 struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr;
5092 if (sizeof (void *) != TYPE_LENGTH (ptr_type))
5095 /* Other tests here??? */
5100 /* Returns non-zero if process is stopped on a hardware watchpoint
5101 fault, else returns zero. */
5104 procfs_stopped_by_watchpoint (void)
5108 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5110 if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
5112 if (proc_why (pi) == PR_FAULTED)
5115 if (proc_what (pi) == FLTWATCH)
5119 if (proc_what (pi) == FLTKWATCH)
5127 /* Returns 1 if the OS knows the position of the triggered watchpoint,
5128 and sets *ADDR to that address. Returns 0 if OS cannot report that
5129 address. This function is only called if
5130 procfs_stopped_by_watchpoint returned 1, thus no further checks are
5131 done. The function also assumes that ADDR is not NULL. */
5134 procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr)
5138 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5139 return proc_watchpoint_address (pi, addr);
5143 procfs_insert_watchpoint (CORE_ADDR addr, int len, int type,
5144 struct expression *cond)
5146 if (!target_have_steppable_watchpoint
5147 && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch))
5149 /* When a hardware watchpoint fires off the PC will be left at
5150 the instruction following the one which caused the
5151 watchpoint. It will *NOT* be necessary for GDB to step over
5153 return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1);
5157 /* When a hardware watchpoint fires off the PC will be left at
5158 the instruction which caused the watchpoint. It will be
5159 necessary for GDB to step over the watchpoint. */
5160 return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0);
5165 procfs_remove_watchpoint (CORE_ADDR addr, int len, int type,
5166 struct expression *cond)
5168 return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0);
5172 procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
5174 /* The man page for proc(4) on Solaris 2.6 and up says that the
5175 system can support "thousands" of hardware watchpoints, but gives
5176 no method for finding out how many; It doesn't say anything about
5177 the allowed size for the watched area either. So we just tell
5183 procfs_use_watchpoints (struct target_ops *t)
5185 t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint;
5186 t->to_insert_watchpoint = procfs_insert_watchpoint;
5187 t->to_remove_watchpoint = procfs_remove_watchpoint;
5188 t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint;
5189 t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint;
5190 t->to_stopped_data_address = procfs_stopped_data_address;
5193 /* Memory Mappings Functions: */
5195 /* Call a callback function once for each mapping, passing it the
5196 mapping, an optional secondary callback function, and some optional
5197 opaque data. Quit and return the first non-zero value returned
5200 PI is the procinfo struct for the process to be mapped. FUNC is
5201 the callback function to be called by this iterator. DATA is the
5202 optional opaque data to be passed to the callback function.
5203 CHILD_FUNC is the optional secondary function pointer to be passed
5204 to the child function. Returns the first non-zero return value
5205 from the callback function, or zero. */
5208 iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func,
5210 int (*func) (struct prmap *map,
5211 find_memory_region_ftype child_func,
5214 char pathname[MAX_PROC_NAME_SIZE];
5215 struct prmap *prmaps;
5216 struct prmap *prmap;
5224 /* Get the number of mappings, allocate space,
5225 and read the mappings into prmaps. */
5228 sprintf (pathname, "/proc/%d/map", pi->pid);
5229 if ((map_fd = open (pathname, O_RDONLY)) < 0)
5230 proc_error (pi, "iterate_over_mappings (open)", __LINE__);
5232 /* Make sure it gets closed again. */
5233 make_cleanup_close (map_fd);
5235 /* Use stat to determine the file size, and compute
5236 the number of prmap_t objects it contains. */
5237 if (fstat (map_fd, &sbuf) != 0)
5238 proc_error (pi, "iterate_over_mappings (fstat)", __LINE__);
5240 nmap = sbuf.st_size / sizeof (prmap_t);
5241 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
5242 if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps))
5243 != (nmap * sizeof (*prmaps)))
5244 proc_error (pi, "iterate_over_mappings (read)", __LINE__);
5246 /* Use ioctl command PIOCNMAP to get number of mappings. */
5247 if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0)
5248 proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__);
5250 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
5251 if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0)
5252 proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__);
5255 for (prmap = prmaps; nmap > 0; prmap++, nmap--)
5256 if ((funcstat = (*func) (prmap, child_func, data)) != 0)
5262 /* Implements the to_find_memory_regions method. Calls an external
5263 function for each memory region.
5264 Returns the integer value returned by the callback. */
5267 find_memory_regions_callback (struct prmap *map,
5268 find_memory_region_ftype func, void *data)
5270 return (*func) ((CORE_ADDR) map->pr_vaddr,
5272 (map->pr_mflags & MA_READ) != 0,
5273 (map->pr_mflags & MA_WRITE) != 0,
5274 (map->pr_mflags & MA_EXEC) != 0,
5278 /* External interface. Calls a callback function once for each
5279 mapped memory region in the child process, passing as arguments:
5281 CORE_ADDR virtual_address,
5283 int read, TRUE if region is readable by the child
5284 int write, TRUE if region is writable by the child
5285 int execute TRUE if region is executable by the child.
5287 Stops iterating and returns the first non-zero value returned by
5291 proc_find_memory_regions (find_memory_region_ftype func, void *data)
5293 procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5295 return iterate_over_mappings (pi, func, data,
5296 find_memory_regions_callback);
5299 /* Returns an ascii representation of a memory mapping's flags. */
5302 mappingflags (long flags)
5304 static char asciiflags[8];
5306 strcpy (asciiflags, "-------");
5307 #if defined (MA_PHYS)
5308 if (flags & MA_PHYS)
5309 asciiflags[0] = 'd';
5311 if (flags & MA_STACK)
5312 asciiflags[1] = 's';
5313 if (flags & MA_BREAK)
5314 asciiflags[2] = 'b';
5315 if (flags & MA_SHARED)
5316 asciiflags[3] = 's';
5317 if (flags & MA_READ)
5318 asciiflags[4] = 'r';
5319 if (flags & MA_WRITE)
5320 asciiflags[5] = 'w';
5321 if (flags & MA_EXEC)
5322 asciiflags[6] = 'x';
5323 return (asciiflags);
5326 /* Callback function, does the actual work for 'info proc
5330 info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore,
5333 unsigned int pr_off;
5335 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
5336 pr_off = (unsigned int) map->pr_offset;
5338 pr_off = map->pr_off;
5341 if (gdbarch_addr_bit (target_gdbarch) == 32)
5342 printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n",
5343 (unsigned long) map->pr_vaddr,
5344 (unsigned long) map->pr_vaddr + map->pr_size - 1,
5345 (unsigned long) map->pr_size,
5347 mappingflags (map->pr_mflags));
5349 printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n",
5350 (unsigned long) map->pr_vaddr,
5351 (unsigned long) map->pr_vaddr + map->pr_size - 1,
5352 (unsigned long) map->pr_size,
5354 mappingflags (map->pr_mflags));
5359 /* Implement the "info proc mappings" subcommand. */
5362 info_proc_mappings (procinfo *pi, int summary)
5365 return; /* No output for summary mode. */
5367 printf_filtered (_("Mapped address spaces:\n\n"));
5368 if (gdbarch_ptr_bit (target_gdbarch) == 32)
5369 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
5376 printf_filtered (" %18s %18s %10s %10s %7s\n",
5383 iterate_over_mappings (pi, NULL, NULL, info_mappings_callback);
5384 printf_filtered ("\n");
5387 /* Implement the "info proc" command. */
5390 info_proc_cmd (char *args, int from_tty)
5392 struct cleanup *old_chain;
5393 procinfo *process = NULL;
5394 procinfo *thread = NULL;
5401 old_chain = make_cleanup (null_cleanup, 0);
5404 argv = gdb_buildargv (args);
5405 make_cleanup_freeargv (argv);
5407 while (argv != NULL && *argv != NULL)
5409 if (isdigit (argv[0][0]))
5411 pid = strtoul (argv[0], &tmp, 10);
5413 tid = strtoul (++tmp, NULL, 10);
5415 else if (argv[0][0] == '/')
5417 tid = strtoul (argv[0] + 1, NULL, 10);
5419 else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0)
5430 pid = PIDGET (inferior_ptid);
5432 error (_("No current process: you must name one."));
5435 /* Have pid, will travel.
5436 First see if it's a process we're already debugging. */
5437 process = find_procinfo (pid, 0);
5438 if (process == NULL)
5440 /* No. So open a procinfo for it, but
5441 remember to close it again when finished. */
5442 process = create_procinfo (pid, 0);
5443 make_cleanup (do_destroy_procinfo_cleanup, process);
5444 if (!open_procinfo_files (process, FD_CTL))
5445 proc_error (process, "info proc, open_procinfo_files", __LINE__);
5449 thread = create_procinfo (pid, tid);
5453 printf_filtered (_("process %d flags:\n"), process->pid);
5454 proc_prettyprint_flags (proc_flags (process), 1);
5455 if (proc_flags (process) & (PR_STOPPED | PR_ISTOP))
5456 proc_prettyprint_why (proc_why (process), proc_what (process), 1);
5457 if (proc_get_nthreads (process) > 1)
5458 printf_filtered ("Process has %d threads.\n",
5459 proc_get_nthreads (process));
5463 printf_filtered (_("thread %d flags:\n"), thread->tid);
5464 proc_prettyprint_flags (proc_flags (thread), 1);
5465 if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP))
5466 proc_prettyprint_why (proc_why (thread), proc_what (thread), 1);
5471 info_proc_mappings (process, 0);
5474 do_cleanups (old_chain);
5477 /* Modify the status of the system call identified by SYSCALLNUM in
5478 the set of syscalls that are currently traced/debugged.
5480 If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set
5481 will be updated. Otherwise, the exit syscalls set will be updated.
5483 If MODE is FLAG_SET, then traces will be enabled. Otherwise, they
5484 will be disabled. */
5487 proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit,
5488 int mode, int from_tty)
5492 if (entry_or_exit == PR_SYSENTRY)
5493 sysset = proc_get_traced_sysentry (pi, NULL);
5495 sysset = proc_get_traced_sysexit (pi, NULL);
5498 proc_error (pi, "proc-trace, get_traced_sysset", __LINE__);
5500 if (mode == FLAG_SET)
5501 gdb_praddsysset (sysset, syscallnum);
5503 gdb_prdelsysset (sysset, syscallnum);
5505 if (entry_or_exit == PR_SYSENTRY)
5507 if (!proc_set_traced_sysentry (pi, sysset))
5508 proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__);
5512 if (!proc_set_traced_sysexit (pi, sysset))
5513 proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__);
5518 proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode)
5522 if (PIDGET (inferior_ptid) <= 0)
5523 error (_("you must be debugging a process to use this command."));
5525 if (args == NULL || args[0] == 0)
5526 error_no_arg (_("system call to trace"));
5528 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5529 if (isdigit (args[0]))
5531 const int syscallnum = atoi (args);
5533 proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty);
5538 proc_trace_sysentry_cmd (char *args, int from_tty)
5540 proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET);
5544 proc_trace_sysexit_cmd (char *args, int from_tty)
5546 proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET);
5550 proc_untrace_sysentry_cmd (char *args, int from_tty)
5552 proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET);
5556 proc_untrace_sysexit_cmd (char *args, int from_tty)
5558 proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET);
5563 _initialize_procfs (void)
5565 observer_attach_inferior_created (procfs_inferior_created);
5567 add_info ("proc", info_proc_cmd, _("\
5568 Show /proc process information about any running process.\n\
5569 Specify process id, or use the program being debugged by default.\n\
5570 Specify keyword 'mappings' for detailed info on memory mappings."));
5571 add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd,
5572 _("Give a trace of entries into the syscall."));
5573 add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd,
5574 _("Give a trace of exits from the syscall."));
5575 add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd,
5576 _("Cancel a trace of entries into the syscall."));
5577 add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd,
5578 _("Cancel a trace of exits from the syscall."));
5581 /* =================== END, GDB "MODULE" =================== */
5585 /* miscellaneous stubs: */
5587 /* The following satisfy a few random symbols mostly created by the
5588 solaris threads implementation, which I will chase down later. */
5590 /* Return a pid for which we guarantee we will be able to find a
5594 procfs_first_available (void)
5596 return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1);
5599 /* =================== GCORE .NOTE "MODULE" =================== */
5600 #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT)
5601 /* gcore only implemented on solaris and unixware (so far) */
5604 procfs_do_thread_registers (bfd *obfd, ptid_t ptid,
5605 char *note_data, int *note_size,
5606 enum target_signal stop_signal)
5608 struct regcache *regcache = get_thread_regcache (ptid);
5609 gdb_gregset_t gregs;
5610 gdb_fpregset_t fpregs;
5611 unsigned long merged_pid;
5612 struct cleanup *old_chain;
5614 merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid);
5616 /* This part is the old method for fetching registers.
5617 It should be replaced by the newer one using regsets
5618 once it is implemented in this platform:
5619 gdbarch_regset_from_core_section() and regset->collect_regset(). */
5621 old_chain = save_inferior_ptid ();
5622 inferior_ptid = ptid;
5623 target_fetch_registers (regcache, -1);
5625 fill_gregset (regcache, &gregs, -1);
5626 #if defined (NEW_PROC_API)
5627 note_data = (char *) elfcore_write_lwpstatus (obfd,
5634 note_data = (char *) elfcore_write_prstatus (obfd,
5641 fill_fpregset (regcache, &fpregs, -1);
5642 note_data = (char *) elfcore_write_prfpreg (obfd,
5648 do_cleanups (old_chain);
5653 struct procfs_corefile_thread_data {
5657 enum target_signal stop_signal;
5661 procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data)
5663 struct procfs_corefile_thread_data *args = data;
5667 ptid_t ptid = MERGEPID (pi->pid, thread->tid);
5669 args->note_data = procfs_do_thread_registers (args->obfd, ptid,
5678 find_signalled_thread (struct thread_info *info, void *data)
5680 if (info->suspend.stop_signal != TARGET_SIGNAL_0
5681 && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
5687 static enum target_signal
5688 find_stop_signal (void)
5690 struct thread_info *info =
5691 iterate_over_threads (find_signalled_thread, NULL);
5694 return info->suspend.stop_signal;
5696 return TARGET_SIGNAL_0;
5700 procfs_make_note_section (bfd *obfd, int *note_size)
5702 struct cleanup *old_chain;
5703 gdb_gregset_t gregs;
5704 gdb_fpregset_t fpregs;
5705 char fname[16] = {'\0'};
5706 char psargs[80] = {'\0'};
5707 procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5708 char *note_data = NULL;
5710 struct procfs_corefile_thread_data thread_args;
5713 enum target_signal stop_signal;
5715 if (get_exec_file (0))
5717 strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname));
5718 strncpy (psargs, get_exec_file (0),
5721 inf_args = get_inferior_args ();
5722 if (inf_args && *inf_args &&
5723 strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs)))
5725 strncat (psargs, " ",
5726 sizeof (psargs) - strlen (psargs));
5727 strncat (psargs, inf_args,
5728 sizeof (psargs) - strlen (psargs));
5732 note_data = (char *) elfcore_write_prpsinfo (obfd,
5738 stop_signal = find_stop_signal ();
5741 fill_gregset (get_current_regcache (), &gregs, -1);
5742 note_data = elfcore_write_pstatus (obfd, note_data, note_size,
5743 PIDGET (inferior_ptid),
5744 stop_signal, &gregs);
5747 thread_args.obfd = obfd;
5748 thread_args.note_data = note_data;
5749 thread_args.note_size = note_size;
5750 thread_args.stop_signal = stop_signal;
5751 proc_iterate_over_threads (pi, procfs_corefile_thread_callback,
5754 /* There should be always at least one thread. */
5755 gdb_assert (thread_args.note_data != note_data);
5756 note_data = thread_args.note_data;
5758 auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV,
5762 note_data = elfcore_write_note (obfd, note_data, note_size,
5763 "CORE", NT_AUXV, auxv, auxv_len);
5767 make_cleanup (xfree, note_data);
5770 #else /* !(Solaris or Unixware) */
5772 procfs_make_note_section (bfd *obfd, int *note_size)
5774 error (_("gcore not implemented for this host."));
5775 return NULL; /* lint */
5777 #endif /* Solaris or Unixware */
5778 /* =================== END GCORE .NOTE "MODULE" =================== */