| 1 | /* prctl - Linux specific syscall. |
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| 2 | Copyright (C) 2020-2024 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 | #include <sysdep.h> |
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| 20 | #include <stdarg.h> |
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| 21 | #include <sys/prctl.h> |
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| 22 | |
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| 23 | /* Unconditionally read all potential arguments. This may pass |
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| 24 | garbage values to the kernel, but avoids the need for teaching |
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| 25 | glibc the argument counts of individual options (including ones |
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| 26 | that are added to the kernel in the future). */ |
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| 27 | |
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| 28 | int |
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| 29 | __prctl (int option, ...) |
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| 30 | { |
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| 31 | va_list arg; |
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| 32 | va_start (arg, option); |
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| 33 | unsigned long int arg2 = va_arg (arg, unsigned long int); |
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| 34 | unsigned long int arg3 = va_arg (arg, unsigned long int); |
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| 35 | unsigned long int arg4 = va_arg (arg, unsigned long int); |
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| 36 | unsigned long int arg5 = va_arg (arg, unsigned long int); |
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| 37 | va_end (arg); |
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| 38 | return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5); |
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| 39 | } |
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| 40 | |
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| 41 | libc_hidden_def (__prctl) |
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| 42 | weak_alias (__prctl, prctl) |
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| 43 | #if __TIMESIZE != 64 |
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| 44 | weak_alias (__prctl, __prctl_time64) |
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| 45 | #endif |
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| 46 | |
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