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_LINUX_LONG_DOUBLE_IEEE128 = 4,
  95   FFI_DEFAULT_ABI = (FFI_LINUX
  96 #  ifdef __STRUCT_PARM_ALIGN__
  97                      | FFI_LINUX_STRUCT_ALIGN
  98 #  endif
  99 #  ifdef __LONG_DOUBLE_128__
 100                      | FFI_LINUX_LONG_DOUBLE_128
 101 #   ifdef __LONG_DOUBLE_IEEE128__
 102                      | FFI_LINUX_LONG_DOUBLE_IEEE128
 103 #   endif
 104 #  endif
 105                      ),
 106   FFI_LAST_ABI = 16
 107
 108 # else
 109   /* This bit, always set in new code, must not be set in any of the
 110      old FFI_COMPAT values that might be used for 32-bit linux/sysv/bsd.  */
 111   FFI_SYSV = 8,
 112   /* This and following bits can reuse FFI_COMPAT values.  */
 113   FFI_SYSV_SOFT_FLOAT = 1,
 114   FFI_SYSV_STRUCT_RET = 2,
 115   FFI_SYSV_IBM_LONG_DOUBLE = 4,
 116   FFI_SYSV_LONG_DOUBLE_128 = 16,
 117
 118   FFI_DEFAULT_ABI = (FFI_SYSV
 119 #  ifdef __NO_FPRS__
 120                      | FFI_SYSV_SOFT_FLOAT
 121 #  endif
 122 #  if (defined (__SVR4_STRUCT_RETURN)                                   \
 123        || defined (POWERPC_FREEBSD) && !defined (__AIX_STRUCT_RETURN))
 124                      | FFI_SYSV_STRUCT_RET
 125 #  endif
 126 #  if __LDBL_MANT_DIG__ == 106
 127                      | FFI_SYSV_IBM_LONG_DOUBLE
 128 #  endif
 129 #  ifdef __LONG_DOUBLE_128__
 130                      | FFI_SYSV_LONG_DOUBLE_128
 131 #  endif
 132                      ),
 133   FFI_LAST_ABI = 32
 134 # endif
 135 #endif
 136
 137 } ffi_abi;
 138 #endif
 139
 140 /* ---- Definitions for closures ----------------------------------------- */
 141
 142 #define FFI_CLOSURES 1
 143 #define FFI_NATIVE_RAW_API 0
 144 #if defined (POWERPC) || defined (POWERPC_FREEBSD)
 145 # define FFI_GO_CLOSURES 1
 146 # define FFI_TARGET_SPECIFIC_VARIADIC 1
 147 # define FFI_EXTRA_CIF_FIELDS unsigned nfixedargs
 148 #endif
 149 #if defined (POWERPC_AIX)
 150 # define FFI_GO_CLOSURES 1
 151 #endif
 152
 153 /* ppc_closure.S and linux64_closure.S expect this.  */
 154 #define FFI_PPC_TYPE_LAST FFI_TYPE_POINTER
 155
 156 /* We define additional types below.  If generic types are added that
 157    must be supported by powerpc libffi then it is likely that
 158    FFI_PPC_TYPE_LAST needs increasing *and* the jump tables in
 159    ppc_closure.S and linux64_closure.S be extended.  */
 160
 161 #if !(FFI_TYPE_LAST == FFI_PPC_TYPE_LAST                \
 162       || (FFI_TYPE_LAST == FFI_TYPE_COMPLEX             \
 163           && !defined FFI_TARGET_HAS_COMPLEX_TYPE))
 164 # error "You likely have a broken powerpc libffi"
 165 #endif
 166
 167 /* Needed for soft-float long-double-128 support.  */
 168 #define FFI_TYPE_UINT128 (FFI_PPC_TYPE_LAST + 1)
 169
 170 /* Needed for FFI_SYSV small structure returns.  */
 171 #define FFI_SYSV_TYPE_SMALL_STRUCT (FFI_PPC_TYPE_LAST + 2)
 172
 173 /* Used by ELFv2 for homogenous structure returns.  */
 174 #define FFI_V2_TYPE_VECTOR              (FFI_PPC_TYPE_LAST + 1)
 175 #define FFI_V2_TYPE_VECTOR_HOMOG        (FFI_PPC_TYPE_LAST + 2)
 176 #define FFI_V2_TYPE_FLOAT_HOMOG         (FFI_PPC_TYPE_LAST + 3)
 177 #define FFI_V2_TYPE_DOUBLE_HOMOG        (FFI_PPC_TYPE_LAST + 4)
 178 #define FFI_V2_TYPE_SMALL_STRUCT        (FFI_PPC_TYPE_LAST + 5)
 179
 180 #if _CALL_ELF == 2
 181 # define FFI_TRAMPOLINE_SIZE 32
 182 #else
 183 # if defined(POWERPC64) || defined(POWERPC_AIX)
 184 #  if defined(POWERPC_DARWIN64)
 185 #    define FFI_TRAMPOLINE_SIZE 48
 186 #  else
 187 #    define FFI_TRAMPOLINE_SIZE 24
 188 #  endif
 189 # else /* POWERPC || POWERPC_AIX */
 190 #  define FFI_TRAMPOLINE_SIZE 40
 191 # endif
 192 #endif
 193
 194 #ifndef LIBFFI_ASM
 195 #if defined(POWERPC_DARWIN) || defined(POWERPC_AIX)
 196 struct ffi_aix_trampoline_struct {
 197     void * code_pointer;        /* Pointer to ffi_closure_ASM */
 198     void * toc;                 /* TOC */
 199     void * static_chain;        /* Pointer to closure */
 200 };
 201 #endif
 202 #endif
 203
 204 #endif