257 lines
8.1 KiB
C
257 lines
8.1 KiB
C
/* Copyright (C) 1992-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <hurd.h>
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#include <hurd/port.h>
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#include <ldsodefs.h>
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#include "set-hooks.h"
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#include "hurdmalloc.h" /* XXX */
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int _hurd_exec_flags;
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struct hurd_port *_hurd_ports;
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unsigned int _hurd_nports;
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mode_t _hurd_umask;
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sigset_t _hurdsig_traced;
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char **__libc_argv;
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int __libc_argc;
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static int *_hurd_intarray;
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static size_t _hurd_intarraysize;
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static mach_port_t *_hurd_portarray;
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static size_t _hurd_portarraysize;
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error_t
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_hurd_ports_use (int which, error_t (*operate) (mach_port_t))
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{
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if (__glibc_unlikely (_hurd_ports == NULL))
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/* This means that _hurd_init has not been called yet, which is
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normally only the case in the bootstrap filesystem, and there
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only in the early phases of booting. */
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return EGRATUITOUS;
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return HURD_PORT_USE (&_hurd_ports[which], (*operate) (port));
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}
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DEFINE_HOOK (_hurd_subinit, (void));
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__typeof (_hurd_proc_init) _hurd_new_proc_init; /* below */
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/* Initialize the library data structures from the
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ints and ports passed to us by the exec server.
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PORTARRAY and INTARRAY are vm_deallocate'd. */
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void
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_hurd_init (int flags, char **argv,
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mach_port_t *portarray, size_t portarraysize,
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int *intarray, size_t intarraysize)
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{
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size_t i;
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_hurd_exec_flags = flags;
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_hurd_ports = malloc (portarraysize * sizeof (*_hurd_ports));
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if (_hurd_ports == NULL)
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__libc_fatal ("Can't allocate _hurd_ports\n");
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_hurd_nports = portarraysize;
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/* See what ports we were passed. */
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for (i = 0; i < portarraysize; ++i)
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_hurd_port_init (&_hurd_ports[i], portarray[i]);
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/* When the user asks for the bootstrap port,
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he will get the one the exec server passed us. */
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__task_set_special_port (__mach_task_self (), TASK_BOOTSTRAP_PORT,
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portarray[INIT_PORT_BOOTSTRAP]);
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if (intarraysize > INIT_UMASK)
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_hurd_umask = intarray[INIT_UMASK] & 0777;
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else
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_hurd_umask = CMASK;
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if (intarraysize > INIT_TRACEMASK)
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_hurdsig_traced = intarray[INIT_TRACEMASK];
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_hurd_intarray = intarray;
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_hurd_intarraysize = intarraysize;
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_hurd_portarray = portarray;
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_hurd_portarraysize = portarraysize;
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if (flags & EXEC_SECURE)
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{
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/* XXX if secure exec, elide environment variables
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which the library uses and could be security holes.
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CORESERVER, COREFILE
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*/
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}
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/* Call other things which want to do some initialization. These are not
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on the __libc_subinit hook because things there like to be able to
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assume the availability of the POSIX.1 services we provide. */
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RUN_RELHOOK (_hurd_subinit, ());
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}
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libc_hidden_def (_hurd_init)
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void
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_hurd_libc_proc_init (char **argv)
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{
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if (_hurd_portarray)
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{
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/* We will start the signal thread, so we need to initialize libpthread
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* if linked in. */
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if (__pthread_initialize_minimal != NULL)
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__pthread_initialize_minimal ();
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/* Tell the proc server we exist, if it does. */
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if (_hurd_portarray[INIT_PORT_PROC] != MACH_PORT_NULL)
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_hurd_new_proc_init (argv, _hurd_intarray, _hurd_intarraysize);
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/* All done with init ints and ports. */
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) _hurd_intarray,
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_hurd_intarraysize * sizeof (int));
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_hurd_intarray = NULL;
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_hurd_intarraysize = 0;
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) _hurd_portarray,
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_hurd_portarraysize * sizeof (mach_port_t));
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_hurd_portarray = NULL;
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_hurd_portarraysize = 0;
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}
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}
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libc_hidden_def (_hurd_libc_proc_init)
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#include <hurd/signal.h>
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/* The user can do "int _hide_arguments = 1;" to make
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sure the arguments are never visible with `ps'. */
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int _hide_arguments, _hide_environment;
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/* Hook for things which should be initialized as soon as the proc
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server is available. */
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DEFINE_HOOK (_hurd_proc_subinit, (void));
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/* Do startup handshaking with the proc server just installed in _hurd_ports.
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Call _hurdsig_init to set up signal processing. */
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void
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_hurd_new_proc_init (char **argv,
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const int *intarray, size_t intarraysize)
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{
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mach_port_t oldmsg;
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struct hurd_userlink ulink;
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process_t procserver;
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/* Initialize the signal code; Mach exceptions will become signals. */
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_hurdsig_init (intarray, intarraysize);
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/* The signal thread is now prepared to receive messages.
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It is safe to give the port to the proc server. */
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procserver = _hurd_port_get (&_hurd_ports[INIT_PORT_PROC], &ulink);
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/* Give the proc server our message port. */
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__proc_setmsgport (procserver, _hurd_msgport, &oldmsg);
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if (oldmsg != MACH_PORT_NULL)
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/* Deallocate the old msg port we replaced. */
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__mach_port_deallocate (__mach_task_self (), oldmsg);
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/* Tell the proc server where our args and environment are. */
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__proc_set_arg_locations (procserver,
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_hide_arguments ? 0 : (vm_address_t) argv,
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_hide_environment ? 0 : (vm_address_t) __environ);
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_hurd_port_free (&_hurd_ports[INIT_PORT_PROC], &ulink, procserver);
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/* Initialize proc server-assisted fault recovery for the signal thread. */
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_hurdsig_fault_init ();
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/* Call other things which want to do some initialization. These are not
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on the _hurd_subinit hook because things there assume that things done
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here, like _hurd_pid, are already initialized. */
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RUN_RELHOOK (_hurd_proc_subinit, ());
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/* XXX This code should probably be removed entirely at some point. This
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conditional should make it reasonably usable with old gdb's for a
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while. Eventually it probably makes most sense for the exec server to
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mask out EXEC_SIGTRAP so the debugged program is closer to not being
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able to tell it's being debugged. */
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if (!__sigisemptyset (&_hurdsig_traced)
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#ifdef EXEC_SIGTRAP
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&& !(_hurd_exec_flags & EXEC_SIGTRAP)
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#endif
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)
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/* This process is "traced", meaning it should stop on signals or exec.
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We are all set up now to handle signals. Stop ourselves, to inform
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our parent (presumably a debugger) that the exec has completed. */
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__msg_sig_post (_hurd_msgport, SIGTRAP, TRAP_TRACE, __mach_task_self ());
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}
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#include <shlib-compat.h>
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versioned_symbol (libc, _hurd_new_proc_init, _hurd_proc_init, GLIBC_2_1);
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/* Called when we get a message telling us to change our proc server port. */
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error_t
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_hurd_setproc (process_t procserver)
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{
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error_t err;
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mach_port_t oldmsg;
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/* Give the proc server our message port. */
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if (err = __proc_setmsgport (procserver, _hurd_msgport, &oldmsg))
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return err;
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if (oldmsg != MACH_PORT_NULL)
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/* Deallocate the old msg port we replaced. */
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__mach_port_deallocate (__mach_task_self (), oldmsg);
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/* Tell the proc server where our args and environment are. */
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if (err = __proc_set_arg_locations (procserver,
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_hide_arguments ? 0
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: (vm_address_t) __libc_argv,
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_hide_environment ? 0
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: (vm_address_t) __environ))
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return err;
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/* Those calls worked, so the port looks good. */
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_hurd_port_set (&_hurd_ports[INIT_PORT_PROC], procserver);
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{
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pid_t oldpgrp = _hurd_pgrp;
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/* Call these functions again so they can fetch the
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new information from the new proc server. */
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RUN_RELHOOK (_hurd_proc_subinit, ());
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if (_hurd_pgrp != oldpgrp)
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{
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/* Run things that want notification of a pgrp change. */
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DECLARE_HOOK (_hurd_pgrp_changed_hook, (pid_t));
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RUN_HOOK (_hurd_pgrp_changed_hook, (_hurd_pgrp));
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}
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}
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return 0;
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}
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