xref: /aosp_15_r20/external/libffi/src/powerpc/ffitarget.h (revision 1fd5a2e1d639cd1ddf29dd0c484c123bbd850c21)

/* -----------------------------------------------------------------*-C-*-
   ffitarget.h - Copyright (c) 2012  Anthony Green
                 Copyright (C) 2007, 2008, 2010 Free Software Foundation, Inc
                 Copyright (c) 1996-2003  Red Hat, Inc.

   Target configuration macros for PowerPC.

   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.

   ----------------------------------------------------------------------- */

#ifndef LIBFFI_TARGET_H
#define LIBFFI_TARGET_H

#ifndef LIBFFI_H
#error "Please do not include ffitarget.h directly into your source.  Use ffi.h instead."
#endif

/* ---- System specific configurations ----------------------------------- */

#if defined (POWERPC) && defined (__powerpc64__)	/* linux64 */
#ifndef POWERPC64
#define POWERPC64
#endif
#elif defined (POWERPC_DARWIN) && defined (__ppc64__)	/* Darwin64 */
#ifndef POWERPC64
#define POWERPC64
#endif
#ifndef POWERPC_DARWIN64
#define POWERPC_DARWIN64
#endif
#elif defined (POWERPC_AIX) && defined (__64BIT__)	/* AIX64 */
#ifndef POWERPC64
#define POWERPC64
#endif
#endif

#ifndef LIBFFI_ASM
typedef unsigned long          ffi_arg;
typedef signed long            ffi_sarg;

typedef enum ffi_abi {
  FFI_FIRST_ABI = 0,

#if defined (POWERPC_AIX)
  FFI_AIX,
  FFI_DARWIN,
  FFI_DEFAULT_ABI = FFI_AIX,
  FFI_LAST_ABI

#elif defined (POWERPC_DARWIN)
  FFI_AIX,
  FFI_DARWIN,
  FFI_DEFAULT_ABI = FFI_DARWIN,
  FFI_LAST_ABI

#else
  /* The FFI_COMPAT values are used by old code.  Since libffi may be
     a shared library we have to support old values for backwards
     compatibility.  */
  FFI_COMPAT_SYSV,
  FFI_COMPAT_GCC_SYSV,
  FFI_COMPAT_LINUX64,
  FFI_COMPAT_LINUX,
  FFI_COMPAT_LINUX_SOFT_FLOAT,

# if defined (POWERPC64)
  /* This bit, always set in new code, must not be set in any of the
     old FFI_COMPAT values that might be used for 64-bit linux.  We
     only need worry about FFI_COMPAT_LINUX64, but to be safe avoid
     all old values.  */
  FFI_LINUX = 8,
  /* This and following bits can reuse FFI_COMPAT values.  */
  FFI_LINUX_STRUCT_ALIGN = 1,
  FFI_LINUX_LONG_DOUBLE_128 = 2,
  FFI_LINUX_LONG_DOUBLE_IEEE128 = 4,
  FFI_DEFAULT_ABI = (FFI_LINUX
#  ifdef __STRUCT_PARM_ALIGN__
		     | FFI_LINUX_STRUCT_ALIGN
#  endif
#  ifdef __LONG_DOUBLE_128__
		     | FFI_LINUX_LONG_DOUBLE_128
#   ifdef __LONG_DOUBLE_IEEE128__
		     | FFI_LINUX_LONG_DOUBLE_IEEE128
#   endif
#  endif
		     ),
  FFI_LAST_ABI = 16

# else
  /* This bit, always set in new code, must not be set in any of the
     old FFI_COMPAT values that might be used for 32-bit linux/sysv/bsd.  */
  FFI_SYSV = 8,
  /* This and following bits can reuse FFI_COMPAT values.  */
  FFI_SYSV_SOFT_FLOAT = 1,
  FFI_SYSV_STRUCT_RET = 2,
  FFI_SYSV_IBM_LONG_DOUBLE = 4,
  FFI_SYSV_LONG_DOUBLE_128 = 16,

  FFI_DEFAULT_ABI = (FFI_SYSV
#  ifdef __NO_FPRS__
		     | FFI_SYSV_SOFT_FLOAT
#  endif
#  if (defined (__SVR4_STRUCT_RETURN)					\
       || defined (POWERPC_FREEBSD) && !defined (__AIX_STRUCT_RETURN))
		     | FFI_SYSV_STRUCT_RET
#  endif
#  if __LDBL_MANT_DIG__ == 106
		     | FFI_SYSV_IBM_LONG_DOUBLE
#  endif
#  ifdef __LONG_DOUBLE_128__
		     | FFI_SYSV_LONG_DOUBLE_128
#  endif
		     ),
  FFI_LAST_ABI = 32
# endif
#endif

} ffi_abi;
#endif

/* ---- Definitions for closures ----------------------------------------- */

#define FFI_CLOSURES 1
#define FFI_NATIVE_RAW_API 0
#if defined (POWERPC) || defined (POWERPC_FREEBSD)
# define FFI_GO_CLOSURES 1
# define FFI_TARGET_SPECIFIC_VARIADIC 1
# define FFI_EXTRA_CIF_FIELDS unsigned nfixedargs
#endif
#if defined (POWERPC_AIX)
# define FFI_GO_CLOSURES 1
#endif

/* ppc_closure.S and linux64_closure.S expect this.  */
#define FFI_PPC_TYPE_LAST FFI_TYPE_POINTER

/* We define additional types below.  If generic types are added that
   must be supported by powerpc libffi then it is likely that
   FFI_PPC_TYPE_LAST needs increasing *and* the jump tables in
   ppc_closure.S and linux64_closure.S be extended.  */

#if !(FFI_TYPE_LAST == FFI_PPC_TYPE_LAST		\
      || (FFI_TYPE_LAST == FFI_TYPE_COMPLEX		\
	  && !defined FFI_TARGET_HAS_COMPLEX_TYPE))
# error "You likely have a broken powerpc libffi"
#endif

/* Needed for soft-float long-double-128 support.  */
#define FFI_TYPE_UINT128 (FFI_PPC_TYPE_LAST + 1)

/* Needed for FFI_SYSV small structure returns.  */
#define FFI_SYSV_TYPE_SMALL_STRUCT (FFI_PPC_TYPE_LAST + 2)

/* Used by ELFv2 for homogenous structure returns.  */
#define FFI_V2_TYPE_VECTOR		(FFI_PPC_TYPE_LAST + 1)
#define FFI_V2_TYPE_VECTOR_HOMOG	(FFI_PPC_TYPE_LAST + 2)
#define FFI_V2_TYPE_FLOAT_HOMOG		(FFI_PPC_TYPE_LAST + 3)
#define FFI_V2_TYPE_DOUBLE_HOMOG	(FFI_PPC_TYPE_LAST + 4)
#define FFI_V2_TYPE_SMALL_STRUCT	(FFI_PPC_TYPE_LAST + 5)

#if _CALL_ELF == 2
# define FFI_TRAMPOLINE_SIZE 32
#else
# if defined(POWERPC64) || defined(POWERPC_AIX)
#  if defined(POWERPC_DARWIN64)
#    define FFI_TRAMPOLINE_SIZE 48
#  else
#    define FFI_TRAMPOLINE_SIZE 24
#  endif
# else /* POWERPC || POWERPC_AIX */
#  define FFI_TRAMPOLINE_SIZE 40
# endif
#endif

#ifndef LIBFFI_ASM
#if defined(POWERPC_DARWIN) || defined(POWERPC_AIX)
struct ffi_aix_trampoline_struct {
    void * code_pointer;	/* Pointer to ffi_closure_ASM */
    void * toc;			/* TOC */
    void * static_chain;	/* Pointer to closure */
};
#endif
#endif

#endif