| 1 | /* vDSO common definition for Linux. |
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| 2 | Copyright (C) 2015-2022 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 | #ifndef SYSDEP_VDSO_LINUX_H |
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| 20 | # define SYSDEP_VDSO_LINUX_H |
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| 21 | |
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| 22 | #include <ldsodefs.h> |
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| 23 | |
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| 24 | #ifndef INTERNAL_VSYSCALL_CALL |
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| 25 | # define INTERNAL_VSYSCALL_CALL(funcptr, nr, args...) \ |
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| 26 | funcptr (args) |
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| 27 | #endif |
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| 28 | |
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| 29 | #define INLINE_VSYSCALL(name, nr, args...) \ |
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| 30 | ({ \ |
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| 31 | __label__ out; \ |
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| 32 | __label__ iserr; \ |
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| 33 | long int sc_ret; \ |
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| 34 | \ |
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| 35 | __typeof (GLRO(dl_vdso_##name)) vdsop = GLRO(dl_vdso_##name); \ |
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| 36 | if (vdsop != NULL) \ |
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| 37 | { \ |
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| 38 | sc_ret = INTERNAL_VSYSCALL_CALL (vdsop, nr, ##args); \ |
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| 39 | if (!INTERNAL_SYSCALL_ERROR_P (sc_ret)) \ |
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| 40 | goto out; \ |
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| 41 | if (INTERNAL_SYSCALL_ERRNO (sc_ret) != ENOSYS) \ |
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| 42 | goto iserr; \ |
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| 43 | } \ |
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| 44 | \ |
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| 45 | sc_ret = INTERNAL_SYSCALL_CALL (name, ##args); \ |
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| 46 | if (INTERNAL_SYSCALL_ERROR_P (sc_ret)) \ |
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| 47 | { \ |
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| 48 | iserr: \ |
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| 49 | __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret)); \ |
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| 50 | sc_ret = -1L; \ |
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| 51 | } \ |
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| 52 | out: \ |
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| 53 | sc_ret; \ |
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| 54 | }) |
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| 55 | |
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| 56 | #endif /* SYSDEP_VDSO_LINUX_H */ |
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| 57 | |
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