remove procfs ctl interface
This interface has no in-tree consumers and has been more or less non-functional for several releases. Remove manpage note that the procfs special file 'mem' is grouped to kmem. This hasn't been true since r81107. Remove procfs' README file. It is an out of date duplication of the manpage (quoth the README: "since the bsd kernel is single-processor..."). Reviewed by: vangyzen, bcr (manpage) Approved by: des (procfs maintainer), vangyzen (mentor) Differential Revision: https://reviews.freebsd.org/D9802
This commit is contained in:
Eric Badger
parent
6977499ccf
commit
99b14d9f1b
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=314690
@ -2,7 +2,7 @@
|
||||
.\" Written by Garrett Wollman
|
||||
.\" This file is in the public domain.
|
||||
.\"
|
||||
.Dd December 26, 2015
|
||||
.Dd March 4, 2017
|
||||
.Dt PROCFS 5
|
||||
.Os
|
||||
.Sh NAME
|
||||
@ -33,48 +33,7 @@ special node called
|
||||
which always refers to the process making the lookup request.
|
||||
.Pp
|
||||
Each node is a directory which contains the following entries:
|
||||
.Pp
|
||||
Each directory contains several files:
|
||||
.Bl -tag -width status
|
||||
.It Pa ctl
|
||||
a write-only file which supports a variety
|
||||
of control operations.
|
||||
Control commands are written as strings to the
|
||||
.Pa ctl
|
||||
file.
|
||||
The control commands are:
|
||||
.Bl -tag -width detach -compact
|
||||
.It attach
|
||||
stops the target process and arranges for the sending
|
||||
process to become the debug control process.
|
||||
.It detach
|
||||
continue execution of the target process and
|
||||
remove it from control by the debug process (which
|
||||
need not be the sending process).
|
||||
.It run
|
||||
continue running the target process until
|
||||
a signal is delivered, a breakpoint is hit, or the
|
||||
target process exits.
|
||||
.It step
|
||||
single step the target process, with no signal delivery.
|
||||
.It wait
|
||||
wait for the target process to come to a steady
|
||||
state ready for debugging.
|
||||
The target process must be in this state before
|
||||
any of the other commands are allowed.
|
||||
.El
|
||||
.Pp
|
||||
The string can also be the name of a signal, lower case
|
||||
and without the
|
||||
.Dv SIG
|
||||
prefix,
|
||||
in which case that signal is delivered to the process
|
||||
(see
|
||||
.Xr sigaction 2 ) .
|
||||
.Pp
|
||||
The
|
||||
.Xr procctl 8
|
||||
utility can be used to clear tracepoints in a stuck process.
|
||||
.It Pa dbregs
|
||||
The debug registers as defined by
|
||||
.Dv "struct dbregs"
|
||||
@ -188,30 +147,8 @@ to indicate that the process is not running within a jail.
|
||||
.El
|
||||
.El
|
||||
.Pp
|
||||
In a normal debugging environment,
|
||||
where the target is fork/exec'd by the debugger,
|
||||
the debugger should fork and the child should stop
|
||||
itself (with a self-inflicted
|
||||
.Dv SIGSTOP
|
||||
for example).
|
||||
The parent should issue a
|
||||
.Dv wait
|
||||
and then an
|
||||
.Dv attach
|
||||
command via the appropriate
|
||||
.Pa ctl
|
||||
file.
|
||||
The child process will receive a
|
||||
.Dv SIGTRAP
|
||||
immediately after the call to exec (see
|
||||
.Xr execve 2 ) .
|
||||
.Pp
|
||||
Each node is owned by the process's user, and belongs to that user's
|
||||
primary group, except for the
|
||||
.Pa mem
|
||||
node, which belongs to the
|
||||
.Li kmem
|
||||
group.
|
||||
primary group.
|
||||
.Sh FILES
|
||||
.Bl -tag -width /proc/curproc/XXXXXXX -compact
|
||||
.It Pa /proc
|
||||
@ -224,8 +161,6 @@ directory containing process information for process
|
||||
directory containing process information for the current process
|
||||
.It Pa /proc/curproc/cmdline
|
||||
the process executable name
|
||||
.It Pa /proc/curproc/ctl
|
||||
used to send control messages to the process
|
||||
.It Pa /proc/curproc/etype
|
||||
executable type
|
||||
.It Pa /proc/curproc/file
|
||||
|
||||
@ -3384,7 +3384,6 @@ fs/nullfs/null_subr.c optional nullfs
|
||||
fs/nullfs/null_vfsops.c optional nullfs
|
||||
fs/nullfs/null_vnops.c optional nullfs
|
||||
fs/procfs/procfs.c optional procfs
|
||||
fs/procfs/procfs_ctl.c optional procfs
|
||||
fs/procfs/procfs_dbregs.c optional procfs
|
||||
fs/procfs/procfs_fpregs.c optional procfs
|
||||
fs/procfs/procfs_ioctl.c optional procfs
|
||||
|
||||
@ -1,113 +0,0 @@
|
||||
saute procfs lyonnais
|
||||
|
||||
procfs supports two levels of directory. the filesystem root
|
||||
directory contains a representation of the system process table.
|
||||
this consists of an entry for each active and zombie process, and
|
||||
an additional entry "curproc" which always represents the process
|
||||
making the lookup request.
|
||||
|
||||
each of the sub-directories contains several files. these files
|
||||
are used to control and interrogate processes. the files implemented
|
||||
are:
|
||||
|
||||
file - xxx. the exec'ed file.
|
||||
|
||||
status - r/o. returns process status.
|
||||
|
||||
ctl - w/o. sends a control message to the process.
|
||||
for example:
|
||||
echo hup > /proc/curproc/note
|
||||
will send a SIGHUP to the shell.
|
||||
whereas
|
||||
echo attach > /proc/1293/ctl
|
||||
would set up process 1293 for debugging.
|
||||
see below for more details.
|
||||
|
||||
mem - r/w. virtual memory image of the process.
|
||||
parts of the address space are readable
|
||||
only if they exist in the target process.
|
||||
a more reasonable alternative might be
|
||||
to return zero pages instead of an error.
|
||||
comments?
|
||||
|
||||
note - w/o. writing a string here sends the
|
||||
equivalent note to the process.
|
||||
[ not implemented. ]
|
||||
|
||||
notepg - w/o. the same as note, but sends to all
|
||||
members of the process group.
|
||||
[ not implemented. ]
|
||||
|
||||
regs - r/w. process register set. this can be read
|
||||
or written any time even if the process
|
||||
is not stopped. since the bsd kernel
|
||||
is single-processor, this implementation
|
||||
will get the "right" register values.
|
||||
a multi-proc kernel would need to do some
|
||||
synchronisation.
|
||||
|
||||
this then looks like:
|
||||
|
||||
% ls -li /proc
|
||||
total 0
|
||||
9 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 0
|
||||
17 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 1
|
||||
89 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 10
|
||||
25 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 2
|
||||
2065 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 257
|
||||
2481 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 309
|
||||
265 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 32
|
||||
3129 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 390
|
||||
3209 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 400
|
||||
3217 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 401
|
||||
3273 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 408
|
||||
393 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 48
|
||||
409 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 50
|
||||
465 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 57
|
||||
481 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 59
|
||||
537 dr-xr-xr-x 2 root kmem 0 Sep 21 15:06 66
|
||||
545 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 67
|
||||
657 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 81
|
||||
665 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 82
|
||||
673 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 83
|
||||
681 dr-xr-xr-x 2 root wheel 0 Sep 21 15:06 84
|
||||
3273 dr-xr-xr-x 2 jsp staff 0 Sep 21 15:06 curproc
|
||||
% ls -li /proc/curproc
|
||||
total 408
|
||||
3341 --w------- 1 jsp staff 0 Sep 21 15:06 ctl
|
||||
1554 -r-xr-xr-x 1 bin bin 90112 Mar 29 04:52 file
|
||||
3339 -rw------- 1 jsp staff 118784 Sep 21 15:06 mem
|
||||
3343 --w------- 1 jsp staff 0 Sep 21 15:06 note
|
||||
3344 --w------- 1 jsp staff 0 Sep 21 15:06 notepg
|
||||
3340 -rw------- 1 jsp staff 0 Sep 21 15:06 regs
|
||||
3342 -r--r--r-- 1 jsp staff 0 Sep 21 15:06 status
|
||||
% df /proc/curproc /proc/curproc/file
|
||||
Filesystem 512-blocks Used Avail Capacity Mounted on
|
||||
proc 2 2 0 100% /proc
|
||||
/dev/wd0a 16186 13548 1018 93% /
|
||||
% cat /proc/curproc/status
|
||||
cat 446 439 400 81 12,0 ctty 748620684 270000 0 0 0 20000 nochan 11 20 20 20 0 21 117
|
||||
|
||||
|
||||
|
||||
the basic sequence of commands written to "ctl" would be
|
||||
|
||||
attach - this stops the target process and
|
||||
arranges for the sending process
|
||||
to become the debug control process
|
||||
wait - wait for the target process to come to
|
||||
a steady state ready for debugging.
|
||||
step - single step, with no signal delivery.
|
||||
run - continue running, with no signal delivery,
|
||||
until next trap or breakpoint.
|
||||
<signame> - deliver signal <signame> and continue running.
|
||||
detach - continue execution of the target process
|
||||
and remove it from control by the debug process
|
||||
|
||||
in a normal debugging environment, where the target is fork/exec'd by
|
||||
the debugger, the debugger should fork and the child should stop itself
|
||||
(with a self-inflicted SIGSTOP). the parent should do a "wait" then an
|
||||
"attach". as before, the child will hit a breakpoint on the first
|
||||
instruction in any newly exec'd image.
|
||||
|
||||
$FreeBSD$
|
||||
@ -104,8 +104,7 @@ procfs_attr(PFS_ATTR_ARGS)
|
||||
{
|
||||
|
||||
/* XXX inefficient, split into separate functions */
|
||||
if (strcmp(pn->pn_name, "ctl") == 0 ||
|
||||
strcmp(pn->pn_name, "note") == 0 ||
|
||||
if (strcmp(pn->pn_name, "note") == 0 ||
|
||||
strcmp(pn->pn_name, "notepg") == 0)
|
||||
vap->va_mode = 0200;
|
||||
else if (strcmp(pn->pn_name, "mem") == 0 ||
|
||||
@ -166,8 +165,6 @@ procfs_init(PFS_INIT_ARGS)
|
||||
procfs_attr, NULL, NULL, PFS_PROCDEP);
|
||||
pfs_create_file(dir, "cmdline", procfs_doproccmdline,
|
||||
NULL, NULL, NULL, PFS_RD);
|
||||
pfs_create_file(dir, "ctl", procfs_doprocctl,
|
||||
procfs_attr, NULL, NULL, PFS_WR);
|
||||
pfs_create_file(dir, "dbregs", procfs_doprocdbregs,
|
||||
procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
|
||||
pfs_create_file(dir, "etype", procfs_doproctype,
|
||||
|
||||
@ -41,7 +41,6 @@
|
||||
int procfs_docurproc(PFS_FILL_ARGS);
|
||||
int procfs_doosrel(PFS_FILL_ARGS);
|
||||
int procfs_doproccmdline(PFS_FILL_ARGS);
|
||||
int procfs_doprocctl(PFS_FILL_ARGS);
|
||||
int procfs_doprocdbregs(PFS_FILL_ARGS);
|
||||
int procfs_doprocfile(PFS_FILL_ARGS);
|
||||
int procfs_doprocfpregs(PFS_FILL_ARGS);
|
||||
|
||||
@ -1,359 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 1993 Jan-Simon Pendry
|
||||
* Copyright (c) 1993
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to Berkeley by
|
||||
* Jan-Simon Pendry.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 4. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)procfs_ctl.c 8.4 (Berkeley) 6/15/94
|
||||
*
|
||||
* From:
|
||||
* $Id: procfs_ctl.c,v 1.51 2003/12/07 17:40:00 des Exp $
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/lock.h>
|
||||
#include <sys/mutex.h>
|
||||
#include <sys/proc.h>
|
||||
#include <sys/ptrace.h>
|
||||
#include <sys/sbuf.h>
|
||||
#include <sys/signalvar.h>
|
||||
#include <sys/sx.h>
|
||||
#include <sys/uio.h>
|
||||
|
||||
#include <fs/pseudofs/pseudofs.h>
|
||||
#include <fs/procfs/procfs.h>
|
||||
|
||||
#include <vm/vm.h>
|
||||
|
||||
/*
|
||||
* True iff process (p) is in trace wait state
|
||||
* relative to process (curp)
|
||||
*/
|
||||
#define TRACE_WAIT_P(curp, p) \
|
||||
(P_SHOULDSTOP(p) && \
|
||||
(p)->p_pptr == (curp) && \
|
||||
((p)->p_flag & P_TRACED))
|
||||
|
||||
#define PROCFS_CTL_ATTACH 1
|
||||
#define PROCFS_CTL_DETACH 2
|
||||
#define PROCFS_CTL_STEP 3
|
||||
#define PROCFS_CTL_RUN 4
|
||||
#define PROCFS_CTL_WAIT 5
|
||||
|
||||
struct namemap {
|
||||
const char *nm_name;
|
||||
int nm_val;
|
||||
};
|
||||
|
||||
static struct namemap ctlnames[] = {
|
||||
/* special /proc commands */
|
||||
{ "attach", PROCFS_CTL_ATTACH },
|
||||
{ "detach", PROCFS_CTL_DETACH },
|
||||
{ "step", PROCFS_CTL_STEP },
|
||||
{ "run", PROCFS_CTL_RUN },
|
||||
{ "wait", PROCFS_CTL_WAIT },
|
||||
{ 0 },
|
||||
};
|
||||
|
||||
static struct namemap signames[] = {
|
||||
/* regular signal names */
|
||||
{ "hup", SIGHUP }, { "int", SIGINT },
|
||||
{ "quit", SIGQUIT }, { "ill", SIGILL },
|
||||
{ "trap", SIGTRAP }, { "abrt", SIGABRT },
|
||||
{ "iot", SIGIOT }, { "emt", SIGEMT },
|
||||
{ "fpe", SIGFPE }, { "kill", SIGKILL },
|
||||
{ "bus", SIGBUS }, { "segv", SIGSEGV },
|
||||
{ "sys", SIGSYS }, { "pipe", SIGPIPE },
|
||||
{ "alrm", SIGALRM }, { "term", SIGTERM },
|
||||
{ "urg", SIGURG }, { "stop", SIGSTOP },
|
||||
{ "tstp", SIGTSTP }, { "cont", SIGCONT },
|
||||
{ "chld", SIGCHLD }, { "ttin", SIGTTIN },
|
||||
{ "ttou", SIGTTOU }, { "io", SIGIO },
|
||||
{ "xcpu", SIGXCPU }, { "xfsz", SIGXFSZ },
|
||||
{ "vtalrm", SIGVTALRM }, { "prof", SIGPROF },
|
||||
{ "winch", SIGWINCH }, { "info", SIGINFO },
|
||||
{ "usr1", SIGUSR1 }, { "usr2", SIGUSR2 },
|
||||
{ 0 },
|
||||
};
|
||||
|
||||
static int procfs_control(struct thread *td, struct proc *p, int op);
|
||||
|
||||
static int
|
||||
procfs_control(struct thread *td, struct proc *p, int op)
|
||||
{
|
||||
int error = 0;
|
||||
struct thread *temp;
|
||||
|
||||
/*
|
||||
* Attach - attaches the target process for debugging
|
||||
* by the calling process.
|
||||
*/
|
||||
if (op == PROCFS_CTL_ATTACH) {
|
||||
sx_xlock(&proctree_lock);
|
||||
PROC_LOCK(p);
|
||||
if ((error = p_candebug(td, p)) != 0)
|
||||
goto out;
|
||||
if (p->p_flag & P_TRACED) {
|
||||
error = EBUSY;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Can't trace yourself! */
|
||||
if (p->p_pid == td->td_proc->p_pid) {
|
||||
error = EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* Go ahead and set the trace flag.
|
||||
* Save the old parent (it's reset in
|
||||
* _DETACH, and also in kern_exit.c:wait4()
|
||||
* Reparent the process so that the tracing
|
||||
* proc gets to see all the action.
|
||||
* Stop the target.
|
||||
*/
|
||||
p->p_flag |= P_TRACED;
|
||||
faultin(p);
|
||||
p->p_xsig = 0; /* XXX ? */
|
||||
p->p_oppid = p->p_pptr->p_pid;
|
||||
if (p->p_pptr != td->td_proc) {
|
||||
proc_reparent(p, td->td_proc);
|
||||
}
|
||||
kern_psignal(p, SIGSTOP);
|
||||
out:
|
||||
PROC_UNLOCK(p);
|
||||
sx_xunlock(&proctree_lock);
|
||||
return (error);
|
||||
}
|
||||
|
||||
/*
|
||||
* Authorization check: rely on normal debugging protection, except
|
||||
* allow processes to disengage debugging on a process onto which
|
||||
* they have previously attached, but no longer have permission to
|
||||
* debug.
|
||||
*/
|
||||
PROC_LOCK(p);
|
||||
if (op != PROCFS_CTL_DETACH &&
|
||||
((error = p_candebug(td, p)))) {
|
||||
PROC_UNLOCK(p);
|
||||
return (error);
|
||||
}
|
||||
|
||||
/*
|
||||
* Target process must be stopped, owned by (td) and
|
||||
* be set up for tracing (P_TRACED flag set).
|
||||
* Allow DETACH to take place at any time for sanity.
|
||||
* Allow WAIT any time, of course.
|
||||
*/
|
||||
switch (op) {
|
||||
case PROCFS_CTL_DETACH:
|
||||
case PROCFS_CTL_WAIT:
|
||||
break;
|
||||
|
||||
default:
|
||||
if (!TRACE_WAIT_P(td->td_proc, p)) {
|
||||
PROC_UNLOCK(p);
|
||||
return (EBUSY);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#ifdef FIX_SSTEP
|
||||
/*
|
||||
* do single-step fixup if needed
|
||||
*/
|
||||
FIX_SSTEP(FIRST_THREAD_IN_PROC(p));
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Don't deliver any signal by default.
|
||||
* To continue with a signal, just send
|
||||
* the signal name to the ctl file
|
||||
*/
|
||||
p->p_xsig = 0;
|
||||
|
||||
switch (op) {
|
||||
/*
|
||||
* Detach. Cleans up the target process, reparent it if possible
|
||||
* and set it running once more.
|
||||
*/
|
||||
case PROCFS_CTL_DETACH:
|
||||
/* if not being traced, then this is a painless no-op */
|
||||
if ((p->p_flag & P_TRACED) == 0) {
|
||||
PROC_UNLOCK(p);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* not being traced any more */
|
||||
p->p_flag &= ~(P_TRACED | P_STOPPED_TRACE);
|
||||
|
||||
/* remove pending SIGTRAP, else the process will die */
|
||||
sigqueue_delete_proc(p, SIGTRAP);
|
||||
FOREACH_THREAD_IN_PROC(p, temp)
|
||||
temp->td_dbgflags &= ~TDB_SUSPEND;
|
||||
PROC_UNLOCK(p);
|
||||
|
||||
/* give process back to original parent */
|
||||
sx_xlock(&proctree_lock);
|
||||
if (p->p_oppid != p->p_pptr->p_pid) {
|
||||
struct proc *pp;
|
||||
|
||||
pp = pfind(p->p_oppid);
|
||||
PROC_LOCK(p);
|
||||
if (pp) {
|
||||
PROC_UNLOCK(pp);
|
||||
proc_reparent(p, pp);
|
||||
}
|
||||
} else
|
||||
PROC_LOCK(p);
|
||||
p->p_oppid = 0;
|
||||
p->p_stops = 0;
|
||||
p->p_flag &= ~P_WAITED; /* XXX ? */
|
||||
sx_xunlock(&proctree_lock);
|
||||
|
||||
wakeup(td->td_proc); /* XXX for CTL_WAIT below ? */
|
||||
|
||||
break;
|
||||
|
||||
/*
|
||||
* Step. Let the target process execute a single instruction.
|
||||
* What does it mean to single step a threaded program?
|
||||
*/
|
||||
case PROCFS_CTL_STEP:
|
||||
error = proc_sstep(FIRST_THREAD_IN_PROC(p));
|
||||
if (error) {
|
||||
PROC_UNLOCK(p);
|
||||
return (error);
|
||||
}
|
||||
break;
|
||||
|
||||
/*
|
||||
* Run. Let the target process continue running until a breakpoint
|
||||
* or some other trap.
|
||||
*/
|
||||
case PROCFS_CTL_RUN:
|
||||
p->p_flag &= ~P_STOPPED_SIG; /* this uses SIGSTOP */
|
||||
break;
|
||||
|
||||
/*
|
||||
* Wait for the target process to stop.
|
||||
* If the target is not being traced then just wait
|
||||
* to enter
|
||||
*/
|
||||
case PROCFS_CTL_WAIT:
|
||||
if (p->p_flag & P_TRACED) {
|
||||
while (error == 0 &&
|
||||
(P_SHOULDSTOP(p)) &&
|
||||
(p->p_flag & P_TRACED) &&
|
||||
(p->p_pptr == td->td_proc))
|
||||
error = msleep(p, &p->p_mtx,
|
||||
PWAIT|PCATCH, "procfsx", 0);
|
||||
if (error == 0 && !TRACE_WAIT_P(td->td_proc, p))
|
||||
error = EBUSY;
|
||||
} else {
|
||||
while (error == 0 && P_SHOULDSTOP(p))
|
||||
error = msleep(p, &p->p_mtx,
|
||||
PWAIT|PCATCH, "procfs", 0);
|
||||
}
|
||||
PROC_UNLOCK(p);
|
||||
return (error);
|
||||
default:
|
||||
panic("procfs_control");
|
||||
}
|
||||
|
||||
PROC_SLOCK(p);
|
||||
thread_unsuspend(p); /* If it can run, let it do so. */
|
||||
PROC_SUNLOCK(p);
|
||||
PROC_UNLOCK(p);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static struct namemap *
|
||||
findname(struct namemap *nm, char *buf, int buflen)
|
||||
{
|
||||
|
||||
for (; nm->nm_name; nm++)
|
||||
if (bcmp(buf, nm->nm_name, buflen+1) == 0)
|
||||
return (nm);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
procfs_doprocctl(PFS_FILL_ARGS)
|
||||
{
|
||||
int error;
|
||||
struct namemap *nm;
|
||||
|
||||
if (uio == NULL || uio->uio_rw != UIO_WRITE)
|
||||
return (EOPNOTSUPP);
|
||||
|
||||
/*
|
||||
* Map signal names into signal generation
|
||||
* or debug control. Unknown commands and/or signals
|
||||
* return EOPNOTSUPP.
|
||||
*
|
||||
* Sending a signal while the process is being debugged
|
||||
* also has the side effect of letting the target continue
|
||||
* to run. There is no way to single-step a signal delivery.
|
||||
*/
|
||||
error = EOPNOTSUPP;
|
||||
|
||||
sbuf_trim(sb);
|
||||
sbuf_finish(sb);
|
||||
nm = findname(ctlnames, sbuf_data(sb), sbuf_len(sb));
|
||||
if (nm) {
|
||||
printf("procfs: got a %s command\n", sbuf_data(sb));
|
||||
error = procfs_control(td, p, nm->nm_val);
|
||||
} else {
|
||||
nm = findname(signames, sbuf_data(sb), sbuf_len(sb));
|
||||
if (nm) {
|
||||
printf("procfs: got a sig%s\n", sbuf_data(sb));
|
||||
PROC_LOCK(p);
|
||||
|
||||
if (TRACE_WAIT_P(td->td_proc, p)) {
|
||||
p->p_xsig = nm->nm_val;
|
||||
#ifdef FIX_SSTEP
|
||||
FIX_SSTEP(FIRST_THREAD_IN_PROC(p));
|
||||
#endif
|
||||
p->p_flag &= ~P_STOPPED_SIG;
|
||||
PROC_SLOCK(p);
|
||||
thread_unsuspend(p);
|
||||
PROC_SUNLOCK(p);
|
||||
} else
|
||||
kern_psignal(p, nm->nm_val);
|
||||
PROC_UNLOCK(p);
|
||||
error = 0;
|
||||
}
|
||||
}
|
||||
|
||||
return (error);
|
||||
}
|
||||
@ -6,7 +6,6 @@ KMOD= procfs
|
||||
SRCS=
|
||||
SRCS+= opt_compat.h
|
||||
SRCS+= vnode_if.h
|
||||
SRCS+= procfs_ctl.c
|
||||
SRCS+= procfs_dbregs.c
|
||||
SRCS+= procfs_fpregs.c
|
||||
SRCS+= procfs_ioctl.c
|
||||
|
||||
Loading…
Reference in New Issue
Block a user