sysdeps/sh/sysdep.h

   1 /* Assembler macros for SH.
   2    Copyright (C) 1999, 2000, 2005 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <sysdeps/generic/sysdep.h>
  21
  22 #ifdef  __ASSEMBLER__
  23
  24 /* Syntactic details of assembler.  */
  25
  26 #ifdef HAVE_ELF
  27
  28 #define ALIGNARG(log2) log2
  29 /* For ELF we need the `.type' directive to make shared libs work right.  */
  30 #define ASM_TYPE_DIRECTIVE(name,typearg) .type name,@##typearg;
  31 #define ASM_SIZE_DIRECTIVE(name) .size name,.-name
  32
  33 #ifdef SHARED
  34 #define PLTJMP(_x)      _x##@PLT
  35 #else
  36 #define PLTJMP(_x)      _x
  37 #endif
  38
  39 #else
  40
  41 #define ALIGNARG(log2) log2
  42 #define ASM_TYPE_DIRECTIVE(name,type)   /* Nothing is specified.  */
  43 #define ASM_SIZE_DIRECTIVE(name)        /* Nothing is specified.  */
  44
  45 #define PLTJMP(_x)      _x
  46
  47 #endif
  48
  49 /* Define an entry point visible from C.  */
  50 #define ENTRY(name)                                                           \
  51   ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);                                   \
  52   ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),function)                           \
  53   .align ALIGNARG(5);                                                         \
  54   C_LABEL(name)                                                               \
  55   cfi_startproc;                                                              \
  56   CALL_MCOUNT
  57
  58 #undef  END
  59 #define END(name)                                                             \
  60   cfi_endproc;                                                                \
  61   ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(name))
  62
  63 /* If compiled for profiling, call `mcount' at the start of each function.  */
  64 #ifdef  PROF
  65 #define CALL_MCOUNT                                     \
  66         mov.l   1f,r1;                                  \
  67         sts.l   pr,@-r15;                               \
  68         cfi_adjust_cfa_offset (4);                      \
  69         cfi_rel_offset (pr, 0);                         \
  70         mova    2f,r0;                                  \
  71         jmp     @r1;                                    \
  72          lds    r0,pr;                                  \
  73         .align  2;                                      \
  74 1:      .long   mcount;                                 \
  75 2:      lds.l   @r15+,pr;                               \
  76         cfi_adjust_cfa_offset (-4);                     \
  77         cfi_restore (pr)
  78
  79 #else
  80 #define CALL_MCOUNT             /* Do nothing.  */
  81 #endif
  82
  83 #ifdef  NO_UNDERSCORES
  84 /* Since C identifiers are not normally prefixed with an underscore
  85    on this system, the asm identifier `syscall_error' intrudes on the
  86    C name space.  Make sure we use an innocuous name.  */
  87 #define syscall_error   __syscall_error
  88 #define mcount          _mcount
  89 #endif
  90
  91 #endif  /* __ASSEMBLER__ */