glibc/sysdeps/unix/sysv/linux/include/sys/syscall.h

/* Wrapper header for <sys/syscall.h>.  Linux version.
   Copyright (C) 2020 Free Software Foundation, Inc.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _SYSCALL_H

#ifdef _ISOMAC
# include <sysdeps/unix/sysv/linux/sys/syscall.h>
#else /* !_ISOMAC */
/* Use the built-in system call list, not <asm/unistd.h>, which may
   not list all the system call numbers we need.  */
# define _SYSCALL_H
# include <arch-syscall.h>
#endif /* !_ISOMAC */

#endif /* _SYSCALL_H */
Linux: Use system call tables during build 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> 2020-01-02 09:18:22 +00:00			`/* Wrapper header for <sys/syscall.h>. Linux version.`
			`Copyright (C) 2020 Free Software Foundation, Inc.`

			`The GNU C Library is free software; you can redistribute it and/or`
			`modify it under the terms of the GNU Lesser General Public`
			`License as published by the Free Software Foundation; either`
			`version 2.1 of the License, or (at your option) any later version.`

			`The GNU C Library is distributed in the hope that it will be useful,`
			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
			`Lesser General Public License for more details.`

			`You should have received a copy of the GNU Lesser General Public`
			`License along with the GNU C Library; if not, see`
			`<http://www.gnu.org/licenses/>. */`

			`#ifndef _SYSCALL_H`

			`#ifdef _ISOMAC`
			`# include <sysdeps/unix/sysv/linux/sys/syscall.h>`
			`#else /* !_ISOMAC */`
			`/* Use the built-in system call list, not <asm/unistd.h>, which may`
			`not list all the system call numbers we need. */`
			`# define _SYSCALL_H`
			`# include <arch-syscall.h>`
			`#endif /* !_ISOMAC */`

			`#endif /* _SYSCALL_H */`