sysdeps/unix/mips/sysdep.h

   1 /* Copyright (C) 1992, 1995, 1997, 1999 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Brendan Kehoe (brendan@zen.org).
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <sysdeps/unix/sysdep.h>
  21
  22 #ifdef __ASSEMBLER__
  23
  24 #include <regdef.h>
  25
  26 #define ENTRY(name) \
  27   .globl name;                                                                \
  28   .align 2;                                                                   \
  29   .ent name,0;                                                                \
  30   name##:
  31
  32 /* Note that while it's better structurally, going back to call __syscall_error
  33    can make things confusing if you're debugging---it looks like it's jumping
  34    backwards into the previous fn.  */
  35 #ifdef PIC
  36  #define PSEUDO(name, syscall_name, args) \
  37   .align 2;                                                                   \
  38   99: la t9,__syscall_error;                                                  \
  39   jr t9;                                                                      \
  40   ENTRY(name)                                                                 \
  41   .set noreorder;                                                             \
  42   .cpload t9;                                                                 \
  43   li v0, SYS_##syscall_name;                                                  \
  44   syscall;                                                                    \
  45   .set reorder;                                                               \
  46   bne a3, zero, 99b;                                                          \
  47 syse1:
  48 #else
  49 #define PSEUDO(name, syscall_name, args) \
  50   .set noreorder;                                                             \
  51   .align 2;                                                                   \
  52   99: j __syscall_error;                                                              \
  53   ENTRY(name)                                                                 \
  54   .set noreorder;                                                             \
  55   li v0, SYS_##syscall_name;                                                  \
  56   syscall;                                                                    \
  57   .set reorder;                                                               \
  58   bne a3, zero, 99b;                                                          \
  59 syse1:
  60 #endif
  61
  62 #undef PSEUDO_END
  63 #define PSEUDO_END(sym) .end sym
  64
  65 #define ret     j ra ; nop
  66
  67 #undef END
  68 #define END(sym)        .end sym
  69
  70 #define r0      v0
  71 #define r1      v1
  72 /* The mips move insn is d,s.  */
  73 #define MOVE(x,y)       move y , x
  74
  75 #endif