libffi/src/powerpc/ffitarget.h

   1 /* -----------------------------------------------------------------*-C-*-
   2    ffitarget.h - Copyright (c) 2012  Anthony Green
   3                  Copyright (C) 2007, 2008, 2010 Free Software Foundation, Inc
   4                  Copyright (c) 1996-2003  Red Hat, Inc.
   5
   6    Target configuration macros for PowerPC.
   7
   8    Permission is hereby granted, free of charge, to any person obtaining
   9    a copy of this software and associated documentation files (the
  10    ``Software''), to deal in the Software without restriction, including
  11    without limitation the rights to use, copy, modify, merge, publish,
  12    distribute, sublicense, and/or sell copies of the Software, and to
  13    permit persons to whom the Software is furnished to do so, subject to
  14    the following conditions:
  15
  16    The above copyright notice and this permission notice shall be included
  17    in all copies or substantial portions of the Software.
  18
  19    THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
  20    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22    NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  23    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  24    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  26    DEALINGS IN THE SOFTWARE.
  27
  28    ----------------------------------------------------------------------- */
  29
  30 #ifndef LIBFFI_TARGET_H
  31 #define LIBFFI_TARGET_H
  32
  33 #ifndef LIBFFI_H
  34 #error "Please do not include ffitarget.h directly into your source.  Use ffi.h instead."
  35 #endif
  36
  37 /* ---- System specific configurations ----------------------------------- */
  38
  39 #if defined (POWERPC) && defined (__powerpc64__)        /* linux64 */
  40 #ifndef POWERPC64
  41 #define POWERPC64
  42 #endif
  43 #elif defined (POWERPC_DARWIN) && defined (__ppc64__)   /* Darwin64 */
  44 #ifndef POWERPC64
  45 #define POWERPC64
  46 #endif
  47 #ifndef POWERPC_DARWIN64
  48 #define POWERPC_DARWIN64
  49 #endif
  50 #elif defined (POWERPC_AIX) && defined (__64BIT__)      /* AIX64 */
  51 #ifndef POWERPC64
  52 #define POWERPC64
  53 #endif
  54 #endif
  55
  56 #ifndef LIBFFI_ASM
  57 typedef unsigned long          ffi_arg;
  58 typedef signed long            ffi_sarg;
  59
  60 typedef enum ffi_abi {
  61   FFI_FIRST_ABI = 0,
  62
  63 #if defined (POWERPC_AIX)
  64   FFI_AIX,
  65   FFI_DARWIN,
  66   FFI_DEFAULT_ABI = FFI_AIX,
  67   FFI_LAST_ABI
  68
  69 #elif defined (POWERPC_DARWIN)
  70   FFI_AIX,
  71   FFI_DARWIN,
  72   FFI_DEFAULT_ABI = FFI_DARWIN,
  73   FFI_LAST_ABI
  74
  75 #else
  76   /* The FFI_COMPAT values are used by old code.  Since libffi may be
  77      a shared library we have to support old values for backwards
  78      compatibility.  */
  79   FFI_COMPAT_SYSV,
  80   FFI_COMPAT_GCC_SYSV,
  81   FFI_COMPAT_LINUX64,
  82   FFI_COMPAT_LINUX,
  83   FFI_COMPAT_LINUX_SOFT_FLOAT,
  84
  85 # if defined (POWERPC64)
  86   /* This bit, always set in new code, must not be set in any of the
  87      old FFI_COMPAT values that might be used for 64-bit linux.  We
  88      only need worry about FFI_COMPAT_LINUX64, but to be safe avoid
  89      all old values.  */
  90   FFI_LINUX = 8,
  91   /* This and following bits can reuse FFI_COMPAT values.  */
  92   FFI_LINUX_STRUCT_ALIGN = 1,
  93   FFI_LINUX_LONG_DOUBLE_128 = 2,
  94   FFI_DEFAULT_ABI = (FFI_LINUX
  95 #  ifdef __STRUCT_PARM_ALIGN__
  96                      | FFI_LINUX_STRUCT_ALIGN
  97 #  endif
  98 #  ifdef __LONG_DOUBLE_128__
  99                      | FFI_LINUX_LONG_DOUBLE_128
 100 #  endif
 101                      ),
 102   FFI_LAST_ABI = 12
 103
 104 # else
 105   /* This bit, always set in new code, must not be set in any of the
 106      old FFI_COMPAT values that might be used for 32-bit linux/sysv/bsd.  */
 107   FFI_SYSV = 8,
 108   /* This and following bits can reuse FFI_COMPAT values.  */
 109   FFI_SYSV_SOFT_FLOAT = 1,
 110   FFI_SYSV_STRUCT_RET = 2,
 111   FFI_SYSV_IBM_LONG_DOUBLE = 4,
 112   FFI_SYSV_LONG_DOUBLE_128 = 16,
 113
 114   FFI_DEFAULT_ABI = (FFI_SYSV
 115 #  ifdef __NO_FPRS__
 116                      | FFI_SYSV_SOFT_FLOAT
 117 #  endif
 118 #  if (defined (__SVR4_STRUCT_RETURN)                                   \
 119        || defined (POWERPC_FREEBSD) && !defined (__AIX_STRUCT_RETURN))
 120                      | FFI_SYSV_STRUCT_RET
 121 #  endif
 122 #  if __LDBL_MANT_DIG__ == 106
 123                      | FFI_SYSV_IBM_LONG_DOUBLE
 124 #  endif
 125 #  ifdef __LONG_DOUBLE_128__
 126                      | FFI_SYSV_LONG_DOUBLE_128
 127 #  endif
 128                      ),
 129   FFI_LAST_ABI = 32
 130 # endif
 131 #endif
 132
 133 } ffi_abi;
 134 #endif
 135
 136 /* ---- Definitions for closures ----------------------------------------- */
 137
 138 #define FFI_CLOSURES 1
 139 #define FFI_NATIVE_RAW_API 0
 140 #if defined (POWERPC) || defined (POWERPC_FREEBSD)
 141 # define FFI_GO_CLOSURES 1
 142 # define FFI_TARGET_SPECIFIC_VARIADIC 1
 143 # define FFI_EXTRA_CIF_FIELDS unsigned nfixedargs
 144 #endif
 145 #if defined (POWERPC_AIX)
 146 # define FFI_GO_CLOSURES 1
 147 #endif
 148
 149 /* ppc_closure.S and linux64_closure.S expect this.  */
 150 #define FFI_PPC_TYPE_LAST FFI_TYPE_POINTER
 151
 152 /* We define additional types below.  If generic types are added that
 153    must be supported by powerpc libffi then it is likely that
 154    FFI_PPC_TYPE_LAST needs increasing *and* the jump tables in
 155    ppc_closure.S and linux64_closure.S be extended.  */
 156
 157 #if !(FFI_TYPE_LAST == FFI_PPC_TYPE_LAST                \
 158       || (FFI_TYPE_LAST == FFI_TYPE_COMPLEX             \
 159           && !defined FFI_TARGET_HAS_COMPLEX_TYPE))
 160 # error "You likely have a broken powerpc libffi"
 161 #endif
 162
 163 /* Needed for soft-float long-double-128 support.  */
 164 #define FFI_TYPE_UINT128 (FFI_PPC_TYPE_LAST + 1)
 165
 166 /* Needed for FFI_SYSV small structure returns.  */
 167 #define FFI_SYSV_TYPE_SMALL_STRUCT (FFI_PPC_TYPE_LAST + 2)
 168
 169 /* Used by ELFv2 for homogenous structure returns.  */
 170 #define FFI_V2_TYPE_FLOAT_HOMOG         (FFI_PPC_TYPE_LAST + 1)
 171 #define FFI_V2_TYPE_DOUBLE_HOMOG        (FFI_PPC_TYPE_LAST + 2)
 172 #define FFI_V2_TYPE_SMALL_STRUCT        (FFI_PPC_TYPE_LAST + 3)
 173
 174 #if _CALL_ELF == 2
 175 # define FFI_TRAMPOLINE_SIZE 32
 176 #else
 177 # if defined(POWERPC64) || defined(POWERPC_AIX)
 178 #  if defined(POWERPC_DARWIN64)
 179 #    define FFI_TRAMPOLINE_SIZE 48
 180 #  else
 181 #    define FFI_TRAMPOLINE_SIZE 24
 182 #  endif
 183 # else /* POWERPC || POWERPC_AIX */
 184 #  define FFI_TRAMPOLINE_SIZE 40
 185 # endif
 186 #endif
 187
 188 #ifndef LIBFFI_ASM
 189 #if defined(POWERPC_DARWIN) || defined(POWERPC_AIX)
 190 struct ffi_aix_trampoline_struct {
 191     void * code_pointer;        /* Pointer to ffi_closure_ASM */
 192     void * toc;                 /* TOC */
 193     void * static_chain;        /* Pointer to closure */
 194 };
 195 #endif
 196 #endif
 197
 198 #endif