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50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Auxiliary functions to issue the clone syscall.
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Copyright (C) 2021 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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#ifdef __linux__
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# include <support/check.h>
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# include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */
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# include <xsched.h>
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pid_t
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xclone (int (*fn) (void *arg), void *arg, void *stack, size_t stack_size,
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int flags)
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{
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pid_t r = -1;
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# ifdef __ia64__
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extern int __clone2 (int (*fn) (void *arg), void *stack, size_t stack_size,
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int flags, void *arg, ...);
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r = __clone2 (fn, stack, stack_size, flags, arg, /* ptid */ NULL,
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/* tls */ NULL, /* ctid */ NULL);
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# else
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# if _STACK_GROWS_DOWN
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r = clone (fn, stack + stack_size, flags, arg, /* ptid */ NULL,
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/* tls */ NULL, /* ctid */ NULL);
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# elif _STACK_GROWS_UP
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r = clone (fn, stack, flags, arg, /* ptid */ NULL, /* tls */ NULL, NULL);
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# endif
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# endif
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if (r < 0)
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FAIL_EXIT1 ("clone: %m");
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return r;
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}
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#endif
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