sysdeps/microblaze/sysdep.h

   1 /* Copyright (C) 1997-2017 Free Software Foundation, Inc.
   2
   3    This file is part of the GNU C Library.
   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 License as
   7    published by the Free Software Foundation; either version 2.1 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    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/generic/sysdep.h>
  20
  21 #ifdef  __ASSEMBLER__
  22
  23 /* Syntactic details of assembler.  */
  24
  25 # define ALIGNARG(log2) log2
  26 # define ASM_SIZE_DIRECTIVE(name) .size name,.-name
  27
  28 /* Define an entry point visible from C.  */
  29 # define ENTRY(name)                          \
  30   .globl C_SYMBOL_NAME(name);                 \
  31   .type C_SYMBOL_NAME(name),@function;        \
  32   .align ALIGNARG(2);                         \
  33   C_LABEL(name)                               \
  34   CALL_MCOUNT
  35
  36 # undef END
  37 # define END(name) ASM_SIZE_DIRECTIVE(name)
  38
  39
  40 /* If compiled for profiling, call `_mcount' at the start of each function.  */
  41 # ifdef  PROF
  42 /* The mcount code relies on a normal frame pointer being on the stack
  43    to locate our caller, so push one just for its benefit.  */
  44 #  define CALL_MCOUNT                         \
  45    addik r1,r1,-4;                            \
  46    swi r15,r1,0;                              \
  47    brlid r15,JUMPTARGET(mcount);              \
  48    nop;                                       \
  49    lwi r15,r1,0;                              \
  50    addik r1,r1,4;
  51 # else
  52 #  define CALL_MCOUNT        /* Do nothing.  */
  53 # endif
  54
  55 /* Since C identifiers are not normally prefixed with an underscore
  56    on this system, the asm identifier `syscall_error' intrudes on the
  57    C name space.  Make sure we use an innocuous name.  */
  58 # define syscall_error   __syscall_error
  59 # define mcount      _mcount
  60
  61 # define PSEUDO(name, syscall_name, args)     \
  62   .globl syscall_error;                       \
  63   ENTRY (name)                                \
  64     DO_CALL (syscall_name, args);
  65
  66 # define ret                                  \
  67   rtsd r15,8; nop;
  68
  69 # undef PSEUDO_END
  70 # define PSEUDO_END(name)                     \
  71   END (name)
  72
  73 # undef JUMPTARGET
  74 # ifdef PIC
  75 #  define JUMPTARGET(name)   name##@PLTPC
  76 # else
  77 #  define JUMPTARGET(name)   name
  78 # endif
  79
  80 /* Local label name for asm code.  */
  81 # ifndef L
  82 #  define L(name) $L##name
  83 # endif
  84
  85 # endif  /* __ASSEMBLER__  */