sysdeps/sh/sysdep.h

   1 /* Assembler macros for SH.
   2    Copyright (C) 1999, 2000, 2005, 2012 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 /* For ELF we need the `.type' directive to make shared libs work right.  */
  27 #define ASM_TYPE_DIRECTIVE(name,typearg) .type name,@##typearg;
  28 #define ASM_SIZE_DIRECTIVE(name) .size name,.-name
  29
  30 #ifdef SHARED
  31 #define PLTJMP(_x)      _x##@PLT
  32 #else
  33 #define PLTJMP(_x)      _x
  34 #endif
  35
  36
  37 /* Define an entry point visible from C.  */
  38 #define ENTRY(name)                                                           \
  39   ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);                                   \
  40   ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),function)                           \
  41   .align ALIGNARG(5);                                                         \
  42   C_LABEL(name)                                                               \
  43   cfi_startproc;                                                              \
  44   CALL_MCOUNT
  45
  46 #undef  END
  47 #define END(name)                                                             \
  48   cfi_endproc;                                                                \
  49   ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(name))
  50
  51 /* If compiled for profiling, call `mcount' at the start of each function.  */
  52 #ifdef  PROF
  53 #define CALL_MCOUNT                                     \
  54         mov.l   1f,r1;                                  \
  55         sts.l   pr,@-r15;                               \
  56         cfi_adjust_cfa_offset (4);                      \
  57         cfi_rel_offset (pr, 0);                         \
  58         mova    2f,r0;                                  \
  59         jmp     @r1;                                    \
  60          lds    r0,pr;                                  \
  61         .align  2;                                      \
  62 1:      .long   mcount;                                 \
  63 2:      lds.l   @r15+,pr;                               \
  64         cfi_adjust_cfa_offset (-4);                     \
  65         cfi_restore (pr)
  66
  67 #else
  68 #define CALL_MCOUNT             /* Do nothing.  */
  69 #endif
  70
  71 /* Since C identifiers are not normally prefixed with an underscore
  72    on this system, the asm identifier `syscall_error' intrudes on the
  73    C name space.  Make sure we use an innocuous name.  */
  74 #define syscall_error   __syscall_error
  75 #define mcount          _mcount
  76
  77 #endif  /* __ASSEMBLER__ */