1 /* Copyright (C) 1992,93,94,95,96,97,98,99,2000,01
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
25 #include <hurd/port.h>
26 #include "set-hooks.h"
27 #include "hurdmalloc.h" /* XXX */
31 struct hurd_port *_hurd_ports;
32 unsigned int _hurd_nports;
34 sigset_t _hurdsig_traced;
41 _hurd_ports_use (int which, error_t (*operate) (mach_port_t))
43 if (__builtin_expect (_hurd_ports == NULL, 0))
44 /* This means that _hurd_init has not been called yet, which is
45 normally only the case in the bootstrap filesystem, and there
46 only in the early phases of booting. */
49 return HURD_PORT_USE (&_hurd_ports[which], (*operate) (port));
52 DEFINE_HOOK (_hurd_subinit, (void));
54 /* Initialize the library data structures from the
55 ints and ports passed to us by the exec server.
57 PORTARRAY and INTARRAY are vm_deallocate'd. */
60 _hurd_init (int flags, char **argv,
61 mach_port_t *portarray, size_t portarraysize,
62 int *intarray, size_t intarraysize)
66 _hurd_exec_flags = flags;
68 _hurd_ports = malloc (portarraysize * sizeof (*_hurd_ports));
69 if (_hurd_ports == NULL)
70 __libc_fatal ("Can't allocate _hurd_ports\n");
71 _hurd_nports = portarraysize;
73 /* See what ports we were passed. */
74 for (i = 0; i < portarraysize; ++i)
75 _hurd_port_init (&_hurd_ports[i], portarray[i]);
77 /* When the user asks for the bootstrap port,
78 he will get the one the exec server passed us. */
79 __task_set_special_port (__mach_task_self (), TASK_BOOTSTRAP_PORT,
80 portarray[INIT_PORT_BOOTSTRAP]);
82 if (intarraysize > INIT_UMASK)
83 _hurd_umask = intarray[INIT_UMASK] & 0777;
87 if (intarraysize > INIT_TRACEMASK)
88 _hurdsig_traced = intarray[INIT_TRACEMASK];
90 /* Tell the proc server we exist, if it does. */
91 if (portarray[INIT_PORT_PROC] != MACH_PORT_NULL)
92 _hurd_proc_init (argv, intarray, intarraysize);
94 /* All done with init ints and ports. */
95 __vm_deallocate (__mach_task_self (),
96 (vm_address_t) intarray,
97 intarraysize * sizeof (int));
98 __vm_deallocate (__mach_task_self (),
99 (vm_address_t) portarray,
100 portarraysize * sizeof (mach_port_t));
102 if (flags & EXEC_SECURE)
103 /* XXX if secure exec, elide environment variables
104 which the library uses and could be security holes.
108 /* Call other things which want to do some initialization. These are not
109 on the __libc_subinit hook because things there like to be able to
110 assume the availability of the POSIX.1 services we provide. */
111 RUN_HOOK (_hurd_subinit, ());
114 #include <hurd/signal.h>
116 /* The user can do "int _hide_arguments = 1;" to make
117 sure the arguments are never visible with `ps'. */
118 int _hide_arguments, _hide_environment;
120 /* Hook for things which should be initialized as soon as the proc
121 server is available. */
122 DEFINE_HOOK (_hurd_proc_subinit, (void));
124 /* Do startup handshaking with the proc server just installed in _hurd_ports.
125 Call _hurdsig_init to set up signal processing. */
128 _hurd_new_proc_init (char **argv,
129 const int *intarray, size_t intarraysize)
132 struct hurd_userlink ulink;
133 process_t procserver;
135 /* Initialize the signal code; Mach exceptions will become signals. */
136 _hurdsig_init (intarray, intarraysize);
138 /* The signal thread is now prepared to receive messages.
139 It is safe to give the port to the proc server. */
141 procserver = _hurd_port_get (&_hurd_ports[INIT_PORT_PROC], &ulink);
143 /* Give the proc server our message port. */
144 __proc_setmsgport (procserver, _hurd_msgport, &oldmsg);
145 if (oldmsg != MACH_PORT_NULL)
146 /* Deallocate the old msg port we replaced. */
147 __mach_port_deallocate (__mach_task_self (), oldmsg);
149 /* Tell the proc server where our args and environment are. */
150 __proc_set_arg_locations (procserver,
151 _hide_arguments ? 0 : (vm_address_t) argv,
152 _hide_environment ? 0 : (vm_address_t) __environ);
154 _hurd_port_free (&_hurd_ports[INIT_PORT_PROC], &ulink, procserver);
156 /* Initialize proc server-assisted fault recovery for the signal thread. */
157 _hurdsig_fault_init ();
159 /* Call other things which want to do some initialization. These are not
160 on the _hurd_subinit hook because things there assume that things done
161 here, like _hurd_pid, are already initialized. */
162 RUN_HOOK (_hurd_proc_subinit, ());
164 /* XXX This code should probably be removed entirely at some point. This
165 conditional should make it reasonably usable with old gdb's for a
166 while. Eventually it probably makes most sense for the exec server to
167 mask out EXEC_SIGTRAP so the debugged program is closer to not being
168 able to tell it's being debugged. */
171 && !(_hurd_exec_flags & EXEC_SIGTRAP)
174 /* This process is "traced", meaning it should stop on signals or exec.
175 We are all set up now to handle signals. Stop ourselves, to inform
176 our parent (presumably a debugger) that the exec has completed. */
177 __msg_sig_post (_hurd_msgport, SIGTRAP, 0, __mach_task_self ());
180 #include <shlib-compat.h>
181 versioned_symbol (libc, _hurd_new_proc_init, _hurd_proc_init, GLIBC_2_1);
183 /* Called when we get a message telling us to change our proc server port. */
186 _hurd_setproc (process_t procserver)
191 /* Give the proc server our message port. */
192 if (err = __proc_setmsgport (procserver, _hurd_msgport, &oldmsg))
194 if (oldmsg != MACH_PORT_NULL)
195 /* Deallocate the old msg port we replaced. */
196 __mach_port_deallocate (__mach_task_self (), oldmsg);
198 /* Tell the proc server where our args and environment are. */
199 if (err = __proc_set_arg_locations (procserver,
200 _hide_arguments ? 0 :
201 (vm_address_t) __libc_argv,
202 _hide_environment ? 0 :
203 (vm_address_t) __environ))
206 /* Those calls worked, so the port looks good. */
207 _hurd_port_set (&_hurd_ports[INIT_PORT_PROC], procserver);
210 pid_t oldpgrp = _hurd_pgrp;
212 /* Call these functions again so they can fetch the
213 new information from the new proc server. */
214 RUN_HOOK (_hurd_proc_subinit, ());
216 if (_hurd_pgrp != oldpgrp)
218 /* Run things that want notification of a pgrp change. */
219 DECLARE_HOOK (_hurd_pgrp_changed_hook, (pid_t));
220 RUN_HOOK (_hurd_pgrp_changed_hook, (_hurd_pgrp));