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- /* Copyright (C) 2001, 2003 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. */
- /* 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, arg6)
- We need to do some arg shifting, the syscall_number will be in
- rax. */
- .text
- .globl syscall
- .type syscall,%function
- 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
- movq 8(%rsp),%r9 /* arg6 is on the stack. */
- syscall /* Do the system call. */
- cmpq $-4095, %rax /* Check %rax for error. */
- jae __syscall_error /* Branch forward if it failed. */
- ret /* Return to caller. */
- .size syscall,.-syscall
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