diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/syscall.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/syscall.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/syscall.S b/sysdeps/unix/sysv/linux/x86_64/syscall.S new file mode 100644 index 0000000000..03144ce832 --- /dev/null +++ b/sysdeps/unix/sysv/linux/x86_64/syscall.S @@ -0,0 +1,44 @@ +/* Copyright (C) 2001 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> + +/* Please consult the file sysdeps/unix/sysv/linux/x86-64/sysdep.h for + more information about the value -4095 used below. */ + +/* Usage: long syscall (syscall_number, arg1, arg2, arg3, arg4, arg5) + We need to do some arg shifting, the syscall_number will be in + rax. */ + + + .text +ENTRY (syscall) + + movq %rdi, %rax /* Syscall number -> rax. */ + movq %rsi, %rdi /* shift arg1 - arg5. */ + movq %rdx, %rsi + movq %rcx, %rdx + movq %r8, %r10 + movq %r9, %r8 + syscall /* Do the system call. */ + cmpq $-4095, %rax /* Check %rax for error. */ + jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ +L(pseudo_end): + ret /* Return to caller. */ + +PSEUDO_END (syscall) |