sysdeps/unix/mips/mips64/sysdep.h

   1 /* Copyright (C) 1992-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Alexandre Oliva <aoliva@redhat.com>.
   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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdeps/unix/mips/sysdep.h>
  20
  21 #ifdef __ASSEMBLER__
  22 #include <sys/asm.h>
  23
  24 /* Note that while it's better structurally, going back to call __syscall_error
  25    can make things confusing if you're debugging---it looks like it's jumping
  26    backwards into the previous fn.  */
  27 #ifdef __PIC__
  28 #define PSEUDO(name, syscall_name, args) \
  29   .align 2;                                                                   \
  30   .set nomips16;                                                              \
  31   cfi_startproc;                                                              \
  32   99:;                                                                        \
  33   .set noat;                                                                  \
  34   .cpsetup t9, $1, name;                                                      \
  35   cfi_register (gp, $1);                                                      \
  36   .set at;                                                                    \
  37   PTR_LA t9,__syscall_error;                                                  \
  38   .cpreturn;                                                                  \
  39   cfi_restore (gp);                                                           \
  40   jr t9;                                                                      \
  41   cfi_endproc;                                                                \
  42   ENTRY(name)                                                                 \
  43   li v0, SYS_ify(syscall_name);                                               \
  44   syscall;                                                                    \
  45   bne a3, zero, 99b;                                                          \
  46 L(syse1):
  47 #else
  48 #define PSEUDO(name, syscall_name, args) \
  49   .set noreorder;                                                             \
  50   .align 2;                                                                   \
  51   .set nomips16;                                                              \
  52   cfi_startproc;                                                              \
  53   99: j __syscall_error;                                                      \
  54   nop;                                                                        \
  55   cfi_endproc;                                                                \
  56   ENTRY(name)                                                                 \
  57   .set noreorder;                                                             \
  58   li v0, SYS_ify(syscall_name);                                               \
  59   syscall;                                                                    \
  60   .set reorder;                                                               \
  61   bne a3, zero, 99b;                                                          \
  62 L(syse1):
  63 #endif
  64
  65 #endif