diff options
| author | Marcus Shawcroft <marcus.shawcroft@arm.com> | 2014-02-10 15:36:16 +0000 |
|---|---|---|
| committer | Marcus Shawcroft <marcus.shawcroft@arm.com> | 2014-02-11 11:36:00 +0000 |
| commit | 75eff3fe90f96783f31f58fa84af1b77e57d1ae4 (patch) | |
| tree | 28a8fda330f53de0eccd291f9c5e52a2056a983a /sysdeps/unix/sysv/linux/aarch64/syscall.S | |
| parent | d35f1e80730ce5afbd4694f2d2e537e4af32a797 (diff) | |
Relocate AArch64 from ports to libc.
This patch moves the AArch64 port to the main sysdeps hierarchy. The
move is essentially:
git mv ports/sysdeps/aarch64 sysdeps/aarch64
git mv ports/sysdeps/unix/sysv/linux/aarch64 sysdeps/unix/sysv/linux/aarch64
The README is updated and I've updated ChangeLog.aarch64 along the
lines of the ARM move. The AArch64 build has been tested to confirm
that there were no changes in objdump -dr output or the shared
objects.
Diffstat (limited to 'sysdeps/unix/sysv/linux/aarch64/syscall.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/syscall.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/syscall.S b/sysdeps/unix/sysv/linux/aarch64/syscall.S new file mode 100644 index 0000000000..20dd6904a9 --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/syscall.S @@ -0,0 +1,44 @@ +/* Copyright (C) 2005-2014 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) |