sysdeps/sh/sysdep.h

   1 /* Assembler macros for SH.
   2    Copyright (C) 1999-2016 Free Software Foundation, Inc.
   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
   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/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 #ifdef SHARED
  29 #define PLTJMP(_x)      _x##@PLT
  30 #else
  31 #define PLTJMP(_x)      _x
  32 #endif
  33
  34
  35 /* Define an entry point visible from C.  */
  36 #define ENTRY(name)                                                           \
  37   .globl C_SYMBOL_NAME(name);                                                 \
  38   .type C_SYMBOL_NAME(name),@function;                                        \
  39   .align ALIGNARG(5);                                                         \
  40   C_LABEL(name)                                                               \
  41   cfi_startproc;                                                              \
  42   CALL_MCOUNT
  43
  44 #undef  END
  45 #define END(name)                                                             \
  46   cfi_endproc;                                                                \
  47   ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(name))
  48
  49 /* If compiled for profiling, call `mcount' at the start of each function.  */
  50 #ifdef  PROF
  51 #define CALL_MCOUNT                                     \
  52         mov.l   1f,r1;                                  \
  53         sts.l   pr,@-r15;                               \
  54         cfi_adjust_cfa_offset (4);                      \
  55         cfi_rel_offset (pr, 0);                         \
  56         mova    2f,r0;                                  \
  57         jmp     @r1;                                    \
  58          lds    r0,pr;                                  \
  59         .align  2;                                      \
  60 1:      .long   mcount;                                 \
  61 2:      lds.l   @r15+,pr;                               \
  62         cfi_adjust_cfa_offset (-4);                     \
  63         cfi_restore (pr)
  64
  65 #else
  66 #define CALL_MCOUNT             /* Do nothing.  */
  67 #endif
  68
  69 /* Since C identifiers are not normally prefixed with an underscore
  70    on this system, the asm identifier `syscall_error' intrudes on the
  71    C name space.  Make sure we use an innocuous name.  */
  72 #define syscall_error   __syscall_error
  73 #define mcount          _mcount
  74
  75 #endif  /* __ASSEMBLER__ */