| 1 | /* Auxiliary functions to issue the clone syscall. |
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| 2 | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifdef __linux__ |
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| 20 | # include <support/check.h> |
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| 21 | # include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */ |
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| 22 | # include <xsched.h> |
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| 23 | |
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| 24 | pid_t |
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| 25 | xclone (int (*fn) (void *arg), void *arg, void *stack, size_t stack_size, |
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| 26 | int flags) |
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| 27 | { |
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| 28 | pid_t r = -1; |
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| 29 | |
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| 30 | # if _STACK_GROWS_DOWN |
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| 31 | r = clone (fn: fn, child_stack: stack + stack_size, flags: flags, arg: arg, /* ptid */ NULL, |
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| 32 | /* tls */ NULL, /* ctid */ NULL); |
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| 33 | # elif _STACK_GROWS_UP |
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| 34 | r = clone (fn, stack, flags, arg, /* ptid */ NULL, /* tls */ NULL, NULL); |
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| 35 | # endif |
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| 36 | |
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| 37 | if (r < 0) |
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| 38 | FAIL_EXIT1 ("clone: %m" ); |
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| 39 | |
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| 40 | return r; |
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| 41 | } |
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| 42 | #endif |
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| 43 | |
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