sysdeps/unix/mips/mips32/sysdep.h

   1 /* Copyright (C) 1992-2015 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdeps/unix/mips/sysdep.h>
  20
  21 /* Note that while it's better structurally, going back to call __syscall_error
  22    can make things confusing if you're debugging---it looks like it's jumping
  23    backwards into the previous fn.  */
  24 #ifdef __PIC__
  25 #define PSEUDO(name, syscall_name, args) \
  26   .align 2;                                                                   \
  27   .set nomips16;                                                              \
  28   cfi_startproc;                                                              \
  29   99: la t9,__syscall_error;                                                  \
  30   jr t9;                                                                      \
  31   cfi_endproc;                                                                \
  32   ENTRY(name)                                                                 \
  33   .set noreorder;                                                             \
  34   .cpload t9;                                                                 \
  35   li v0, SYS_ify(syscall_name);                                               \
  36   syscall;                                                                    \
  37   .set reorder;                                                               \
  38   bne a3, zero, 99b;                                                          \
  39 L(syse1):
  40 #else
  41 #define PSEUDO(name, syscall_name, args) \
  42   .set noreorder;                                                             \
  43   .set nomips16;                                                              \
  44   .align 2;                                                                   \
  45   cfi_startproc;                                                              \
  46   99: j __syscall_error;                                                      \
  47   nop;                                                                        \
  48   cfi_endproc;                                                                \
  49   ENTRY(name)                                                                 \
  50   .set noreorder;                                                             \
  51   li v0, SYS_ify(syscall_name);                                               \
  52   syscall;                                                                    \
  53   .set reorder;                                                               \
  54   bne a3, zero, 99b;                                                          \
  55 L(syse1):
  56 #endif