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- /* Copyright (C) 2005-2019 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- 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/>. */
- #include <sysdep.h>
- /* syscall (int nr, ...)
- AArch64 system calls take between 0 and 7 arguments. On entry here nr
- is in w0 and any other system call arguments are in register x1..x7.
- For kernel entry we need to move the system call nr to x8 then
- load the remaining arguments to register. */
- ENTRY (syscall)
- uxtw x8, w0
- mov x0, x1
- mov x1, x2
- mov x2, x3
- mov x3, x4
- mov x4, x5
- mov x5, x6
- mov x6, x7
- svc 0x0
- cmn x0, #4095
- b.cs 1f
- RET
- 1:
- b SYSCALL_ERROR
- PSEUDO_END (syscall)
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