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41aac87234
If any of the early boot-up tasks calls exit () or returns from main (), terminate it properly instead of crashing on trying to dereference _hurd_ports and getting forcibly terminated by the kernel. We sadly cannot make the __USEPORT macro do the check for _hurd_ports being unset, because it evaluates to the value of the expression provided as the second argument, and that can be of any type; so there is no single suitable fallback value for the macro to evaluate to in case _hurd_ports is unset. Instead, each use site that wants to care for this case will have to do its own checking. Checked on x86_64-gnu. Signed-off-by: Sergey Bugaev <bugaevc@gmail.com> Message-Id: <20230429131354.2507443-4-bugaevc@gmail.com>
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/* Copyright (C) 1993-2023 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 <unistd.h>
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#include <hurd.h>
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#include <hurd/port.h>
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#include <sysdep.h>
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#include <sys/wait.h>
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void
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_hurd_exit (int status)
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{
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if (_hurd_ports != NULL)
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/* Give the proc server our exit status. */
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__USEPORT (PROC, __proc_mark_exit (port, status, 0));
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/* Commit suicide. */
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__task_terminate (__mach_task_self ());
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/* Perhaps the cached mach_task_self was bogus. */
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__task_terminate ((__mach_task_self) ());
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/* This sucker really doesn't want to die. */
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while (1)
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{
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#ifdef LOSE
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LOSE;
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#else
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volatile const int zero = 0, one = 1;
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volatile int lossage = one / zero;
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#endif
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}
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}
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void
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_exit (int status)
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{
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_hurd_exit (W_EXITCODE (status, 0));
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}
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libc_hidden_def (_exit)
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#ifndef NO_RTLD_HIDDEN
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rtld_hidden_def (_exit)
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#endif
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weak_alias (_exit, _Exit)
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