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/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <hurd.h>
#include <hurd/port.h>
#include "set-hooks.h"
#include "hurdmalloc.h" /* XXX */
int _hurd_exec_flags;
struct hurd_port *_hurd_ports;
unsigned int _hurd_nports;
mode_t _hurd_umask;
sigset_t _hurdsig_traced;
char **__libc_argv;
int __libc_argc;
error_t
_hurd_ports_use (int which, error_t (*operate) (mach_port_t))
{
if (__glibc_unlikely (_hurd_ports == NULL))
/* This means that _hurd_init has not been called yet, which is
normally only the case in the bootstrap filesystem, and there
only in the early phases of booting. */
return EGRATUITOUS;
return HURD_PORT_USE (&_hurd_ports[which], (*operate) (port));
}
DEFINE_HOOK (_hurd_subinit, (void));
__typeof (_hurd_proc_init) _hurd_new_proc_init; /* below */
/* Initialize the library data structures from the
ints and ports passed to us by the exec server.
PORTARRAY and INTARRAY are vm_deallocate'd. */
void
_hurd_init (int flags, char **argv,
mach_port_t *portarray, size_t portarraysize,
int *intarray, size_t intarraysize)
{
size_t i;
_hurd_exec_flags = flags;
_hurd_ports = malloc (portarraysize * sizeof (*_hurd_ports));
if (_hurd_ports == NULL)
__libc_fatal ("Can't allocate _hurd_ports\n");
_hurd_nports = portarraysize;
/* See what ports we were passed. */
for (i = 0; i < portarraysize; ++i)
_hurd_port_init (&_hurd_ports[i], portarray[i]);
/* When the user asks for the bootstrap port,
he will get the one the exec server passed us. */
__task_set_special_port (__mach_task_self (), TASK_BOOTSTRAP_PORT,
portarray[INIT_PORT_BOOTSTRAP]);
if (intarraysize > INIT_UMASK)
_hurd_umask = intarray[INIT_UMASK] & 0777;
else
_hurd_umask = CMASK;
if (intarraysize > INIT_TRACEMASK)
_hurdsig_traced = intarray[INIT_TRACEMASK];
/* Tell the proc server we exist, if it does. */
if (portarray[INIT_PORT_PROC] != MACH_PORT_NULL)
_hurd_new_proc_init (argv, intarray, intarraysize);
/* All done with init ints and ports. */
__vm_deallocate (__mach_task_self (),
(vm_address_t) intarray,
intarraysize * sizeof (int));
__vm_deallocate (__mach_task_self (),
(vm_address_t) portarray,
portarraysize * sizeof (mach_port_t));
if (flags & EXEC_SECURE)
/* XXX if secure exec, elide environment variables
which the library uses and could be security holes.
CORESERVER, COREFILE
*/ ;
/* Call other things which want to do some initialization. These are not
on the __libc_subinit hook because things there like to be able to
assume the availability of the POSIX.1 services we provide. */
RUN_HOOK (_hurd_subinit, ());
}
libc_hidden_def (_hurd_init)
#include <hurd/signal.h>
/* The user can do "int _hide_arguments = 1;" to make
sure the arguments are never visible with `ps'. */
int _hide_arguments, _hide_environment;
/* Hook for things which should be initialized as soon as the proc
server is available. */
DEFINE_HOOK (_hurd_proc_subinit, (void));
/* Do startup handshaking with the proc server just installed in _hurd_ports.
Call _hurdsig_init to set up signal processing. */
void
_hurd_new_proc_init (char **argv,
const int *intarray, size_t intarraysize)
{
mach_port_t oldmsg;
struct hurd_userlink ulink;
process_t procserver;
/* Initialize the signal code; Mach exceptions will become signals. */
_hurdsig_init (intarray, intarraysize);
/* The signal thread is now prepared to receive messages.
It is safe to give the port to the proc server. */
procserver = _hurd_port_get (&_hurd_ports[INIT_PORT_PROC], &ulink);
/* Give the proc server our message port. */
__proc_setmsgport (procserver, _hurd_msgport, &oldmsg);
if (oldmsg != MACH_PORT_NULL)
/* Deallocate the old msg port we replaced. */
__mach_port_deallocate (__mach_task_self (), oldmsg);
/* Tell the proc server where our args and environment are. */
__proc_set_arg_locations (procserver,
_hide_arguments ? 0 : (vm_address_t) argv,
_hide_environment ? 0 : (vm_address_t) __environ);
_hurd_port_free (&_hurd_ports[INIT_PORT_PROC], &ulink, procserver);
/* Initialize proc server-assisted fault recovery for the signal thread. */
_hurdsig_fault_init ();
/* Call other things which want to do some initialization. These are not
on the _hurd_subinit hook because things there assume that things done
here, like _hurd_pid, are already initialized. */
RUN_HOOK (_hurd_proc_subinit, ());
/* XXX This code should probably be removed entirely at some point. This
conditional should make it reasonably usable with old gdb's for a
while. Eventually it probably makes most sense for the exec server to
mask out EXEC_SIGTRAP so the debugged program is closer to not being
able to tell it's being debugged. */
if (!__sigisemptyset (&_hurdsig_traced)
#ifdef EXEC_SIGTRAP
&& !(_hurd_exec_flags & EXEC_SIGTRAP)
#endif
)
/* This process is "traced", meaning it should stop on signals or exec.
We are all set up now to handle signals. Stop ourselves, to inform
our parent (presumably a debugger) that the exec has completed. */
__msg_sig_post (_hurd_msgport, SIGTRAP, 0, __mach_task_self ());
}
#include <shlib-compat.h>
versioned_symbol (libc, _hurd_new_proc_init, _hurd_proc_init, GLIBC_2_1);
/* Called when we get a message telling us to change our proc server port. */
error_t
_hurd_setproc (process_t procserver)
{
error_t err;
mach_port_t oldmsg;
/* Give the proc server our message port. */
if (err = __proc_setmsgport (procserver, _hurd_msgport, &oldmsg))
return err;
if (oldmsg != MACH_PORT_NULL)
/* Deallocate the old msg port we replaced. */
__mach_port_deallocate (__mach_task_self (), oldmsg);
/* Tell the proc server where our args and environment are. */
if (err = __proc_set_arg_locations (procserver,
_hide_arguments ? 0 :
(vm_address_t) __libc_argv,
_hide_environment ? 0 :
(vm_address_t) __environ))
return err;
/* Those calls worked, so the port looks good. */
_hurd_port_set (&_hurd_ports[INIT_PORT_PROC], procserver);
{
pid_t oldpgrp = _hurd_pgrp;
/* Call these functions again so they can fetch the
new information from the new proc server. */
RUN_HOOK (_hurd_proc_subinit, ());
if (_hurd_pgrp != oldpgrp)
{
/* Run things that want notification of a pgrp change. */
DECLARE_HOOK (_hurd_pgrp_changed_hook, (pid_t));
RUN_HOOK (_hurd_pgrp_changed_hook, (_hurd_pgrp));
}
}
return 0;
}
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