2007-04-26 04:50:57 +00:00
|
|
|
/* Copyright (C) 2007 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>
|
|
|
|
|
#include <tls.h>
|
|
|
|
|
#define _ERRNO_H 1
|
|
|
|
|
#include <bits/errno.h>
|
|
|
|
|
|
|
|
|
|
/* For the calculation see asm/vsyscall.h. */
|
|
|
|
|
#define VSYSCALL_ADDR_vgetcpu 0xffffffffff600800
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ENTRY (sched_getcpu)
|
|
|
|
|
/* Align stack and create local variable for result. */
|
|
|
|
|
sub $0x8, %rsp
|
|
|
|
|
cfi_adjust_cfa_offset(8)
|
|
|
|
|
|
|
|
|
|
movq %rsp, %rdi
|
|
|
|
|
xorl %esi, %esi
|
|
|
|
|
movl $VGETCPU_CACHE_OFFSET, %edx
|
|
|
|
|
addq %fs:0, %rdx
|
|
|
|
|
|
|
|
|
|
movq $VSYSCALL_ADDR_vgetcpu, %rax
|
|
|
|
|
callq *%rax
|
|
|
|
|
|
2007-08-10 02:05:42 +00:00
|
|
|
cmpq $-4095, %rax
|
2007-04-26 04:50:57 +00:00
|
|
|
jae SYSCALL_ERROR_LABEL
|
|
|
|
|
|
|
|
|
|
movl (%rsp), %eax
|
|
|
|
|
|
|
|
|
|
L(pseudo_end):
|
|
|
|
|
add $0x8, %rsp
|
|
|
|
|
cfi_adjust_cfa_offset(-8)
|
|
|
|
|
ret
|
|
|
|
|
PSEUDO_END(sched_getcpu)
|
