kc3-lang/libffi/src/types.c

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• Hash : ab79d6e2
  Author :
  Date : 2013-11-21T06:12:35
  

  This separates the 32-bit sysv/linux/bsd code from the 64-bit linux code, and makes it possible to link code compiled with different options to those used to compile libffi. For example, a -mlong-double-128 libffi can be used with -mlong-double-64 code. Using the return value area as a place to pass parameters wasn't such a good idea, causing a failure of cls_ulonglong.c. I didn't see this when running the mainline gcc libffi testsuite because that version of the test is inferior to the upstreamm libffi test. Using NUM_FPR_ARG_REGISTERS rather than NUM_FPR_ARG_REGISTERS64 meant that a parameter save area could be allocated before it was strictly necessary. Wrong but harmless. Found when splitting apart ffi.c into 32-bit and 64-bit support.

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• src/types.c

• /* -----------------------------------------------------------------------
     types.c - Copyright (c) 1996, 1998  Red Hat, Inc.
     
     Predefined ffi_types needed by libffi.
  
     Permission is hereby granted, free of charge, to any person obtaining
     a copy of this software and associated documentation files (the
     ``Software''), to deal in the Software without restriction, including
     without limitation the rights to use, copy, modify, merge, publish,
     distribute, sublicense, and/or sell copies of the Software, and to
     permit persons to whom the Software is furnished to do so, subject to
     the following conditions:
  
     The above copyright notice and this permission notice shall be included
     in all copies or substantial portions of the Software.
  
     THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     DEALINGS IN THE SOFTWARE.
     ----------------------------------------------------------------------- */
  
  /* Hide the basic type definitions from the header file, so that we
     can redefine them here as "const".  */
  #define LIBFFI_HIDE_BASIC_TYPES
  
  #include <ffi.h>
  #include <ffi_common.h>
  
  /* Type definitions */
  
  #define FFI_TYPEDEF(name, type, id)		\
  struct struct_align_##name {			\
    char c;					\
    type x;					\
  };						\
  const ffi_type ffi_type_##name = {		\
    sizeof(type),					\
    offsetof(struct struct_align_##name, x),	\
    id, NULL					\
  }
  
  #define FFI_NONCONST_TYPEDEF(name, type, id)	\
  struct struct_align_##name {			\
    char c;					\
    type x;					\
  };						\
  ffi_type ffi_type_##name = {			\
    sizeof(type),					\
    offsetof(struct struct_align_##name, x),	\
    id, NULL					\
  }
  
  /* Size and alignment are fake here. They must not be 0. */
  const ffi_type ffi_type_void = {
    1, 1, FFI_TYPE_VOID, NULL
  };
  
  FFI_TYPEDEF(uint8, UINT8, FFI_TYPE_UINT8);
  FFI_TYPEDEF(sint8, SINT8, FFI_TYPE_SINT8);
  FFI_TYPEDEF(uint16, UINT16, FFI_TYPE_UINT16);
  FFI_TYPEDEF(sint16, SINT16, FFI_TYPE_SINT16);
  FFI_TYPEDEF(uint32, UINT32, FFI_TYPE_UINT32);
  FFI_TYPEDEF(sint32, SINT32, FFI_TYPE_SINT32);
  FFI_TYPEDEF(uint64, UINT64, FFI_TYPE_UINT64);
  FFI_TYPEDEF(sint64, SINT64, FFI_TYPE_SINT64);
  
  FFI_TYPEDEF(pointer, void*, FFI_TYPE_POINTER);
  
  FFI_TYPEDEF(float, float, FFI_TYPE_FLOAT);
  FFI_TYPEDEF(double, double, FFI_TYPE_DOUBLE);
  
  #ifdef __alpha__
  /* Even if we're not configured to default to 128-bit long double, 
     maintain binary compatibility, as -mlong-double-128 can be used
     at any time.  */
  /* Validate the hard-coded number below.  */
  # if defined(__LONG_DOUBLE_128__) && FFI_TYPE_LONGDOUBLE != 4
  #  error FFI_TYPE_LONGDOUBLE out of date
  # endif
  const ffi_type ffi_type_longdouble = { 16, 16, 4, NULL };
  #elif FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
  # if HAVE_LONG_DOUBLE_VARIANT
  FFI_NONCONST_TYPEDEF(longdouble, long double, FFI_TYPE_LONGDOUBLE);
  # else
  FFI_TYPEDEF(longdouble, long double, FFI_TYPE_LONGDOUBLE);
  # endif
  #endif
  

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