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a1bd5f8673
Use <arch-syscall.h> instead of <asm/unistd.h> to obtain the system call numbers. A few direct includes of <asm/unistd.h> need to be removed (if the system call numbers are already provided indirectly by <sysdep.h>) or replaced with <sys/syscall.h>. Current Linux headers for alpha define the required system call names, so most of the _NR_* hacks are no longer needed. For the 32-bit arm architecture, eliminate the INTERNAL_SYSCALL_ARM macro, now that we have regular system call names for cacheflush and set_tls. There are more such cleanup opportunities for other architectures, but these cleanups are required to avoid macro redefinition errors during the build. For ia64, it is desirable to use <asm/break.h> directly to obtain the break number for system calls (which is not a system call number itself). This requires replacing __BREAK_SYSCALL with __IA64_BREAK_SYSCALL because the former is defined as an alias in <asm/unistd.h>, but not in <asm/break.h>. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/* Set flags signalling availability of kernel features based on given
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kernel version number.
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Copyright (C) 2010-2020 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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#ifndef _KERNEL_FEATURES_H
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#define _KERNEL_FEATURES_H 1
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#include_next <kernel-features.h>
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/* Support for statfs64 was added in 5.1. */
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#if __LINUX_KERNEL_VERSION < 0x050100
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# undef __ASSUME_STATFS64
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# define __ASSUME_STATFS64 0
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#endif
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#define __ASSUME_RECV_SYSCALL 1
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#define __ASSUME_SEND_SYSCALL 1
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/* Support for the renameat2 syscall was added in 3.17. */
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#if __LINUX_KERNEL_VERSION < 0x031100
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# undef __ASSUME_RENAMEAT2
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#endif
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/* Support for the execveat syscall was added in 4.2. */
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#if __LINUX_KERNEL_VERSION < 0x040200
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# undef __ASSUME_EXECVEAT
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#endif
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/* Support for copy_file_range, statx was added in kernel 4.13. */
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#if __LINUX_KERNEL_VERSION < 0x040D00
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# undef __ASSUME_MLOCK2
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# undef __ASSUME_STATX
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#endif
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/* Alpha requires old sysvipc even being a 64-bit architecture. */
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#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
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#endif /* _KERNEL_FEATURES_H */
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