lib/libc/x86_64/SYS.h

   1 /*-
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * William Jolitz.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)SYS.h       5.5 (Berkeley) 5/7/91
  33  * $FreeBSD: src/lib/libc/amd64/SYS.h,v 1.30 2008/11/02 01:10:54 peter Exp $
  34  */
  35
  36 #include <sys/syscall.h>
  37 #include <machine/asm.h>
  38
  39 #ifdef PIC
  40 #define RSYSCALL(x)     ENTRY(__CONCAT(__sys_,x));                      \
  41                         .weak CNAME(x);                                 \
  42                         .set CNAME(x),CNAME(__CONCAT(__sys_,x));        \
  43                         .weak CNAME(__CONCAT(_,x));                     \
  44                         .set CNAME(__CONCAT(_,x)),CNAME(__CONCAT(__sys_,x)); \
  45                         mov __CONCAT($SYS_,x),%rax; KERNCALL; jb 2f; ret; \
  46                         2: movq PIC_GOT(HIDENAME(cerror)),%rcx; jmp *%rcx; \
  47                         END(__CONCAT(__sys_,x))
  48
  49 #define PSEUDO(x)       ENTRY(__CONCAT(__sys_,x));                      \
  50                         .weak CNAME(__CONCAT(_,x));                     \
  51                         .set CNAME(__CONCAT(_,x)),CNAME(__CONCAT(__sys_,x)); \
  52                         mov __CONCAT($SYS_,x),%rax; KERNCALL; jb 2f; ret ; \
  53                         2: movq PIC_GOT(HIDENAME(cerror)),%rcx; jmp *%rcx; \
  54                         END(__CONCAT(__sys_,x))
  55 #else
  56 #define RSYSCALL(x)     ENTRY(__CONCAT(__sys_,x));                      \
  57                         .weak CNAME(x);                                 \
  58                         .set CNAME(x),CNAME(__CONCAT(__sys_,x));        \
  59                         .weak CNAME(__CONCAT(_,x));                     \
  60                         .set CNAME(__CONCAT(_,x)),CNAME(__CONCAT(__sys_,x)); \
  61                         mov __CONCAT($SYS_,x),%rax; KERNCALL; jb 2f; ret; \
  62                         2: jmp HIDENAME(cerror);                        \
  63                         END(__CONCAT(__sys_,x))
  64
  65 #define PSEUDO(x)       ENTRY(__CONCAT(__sys_,x));                      \
  66                         .weak CNAME(__CONCAT(_,x));                     \
  67                         .set CNAME(__CONCAT(_,x)),CNAME(__CONCAT(__sys_,x)); \
  68                         mov __CONCAT($SYS_,x),%rax; KERNCALL; jb 2f; ret; \
  69                         2: jmp HIDENAME(cerror);                        \
  70                         END(__CONCAT(__sys_,x))
  71 #endif
  72
  73 #define KERNCALL        movq %rcx, %r10; syscall