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_TARGET_SPECIFIC_VARIADIC 1
142 # define FFI_EXTRA_CIF_FIELDS unsigned nfixedargs
143 #endif
144 
145 /* For additional types like the below, take care about the order in
146    ppc_closures.S. They must follow after the FFI_TYPE_LAST.  */
147 
148 /* Needed for soft-float long-double-128 support.  */
149 #define FFI_TYPE_UINT128 (FFI_TYPE_LAST + 1)
150 
151 /* Needed for FFI_SYSV small structure returns.  */
152 #define FFI_SYSV_TYPE_SMALL_STRUCT (FFI_TYPE_LAST + 2)
153 
154 /* Used by ELFv2 for homogenous structure returns.  */
155 #define FFI_V2_TYPE_FLOAT_HOMOG		(FFI_TYPE_LAST + 1)
156 #define FFI_V2_TYPE_DOUBLE_HOMOG	(FFI_TYPE_LAST + 2)
157 #define FFI_V2_TYPE_SMALL_STRUCT	(FFI_TYPE_LAST + 3)
158 
159 #if _CALL_ELF == 2
160 # define FFI_TRAMPOLINE_SIZE 32
161 #else
162 # if defined(POWERPC64) || defined(POWERPC_AIX)
163 #  if defined(POWERPC_DARWIN64)
164 #    define FFI_TRAMPOLINE_SIZE 48
165 #  else
166 #    define FFI_TRAMPOLINE_SIZE 24
167 #  endif
168 # else /* POWERPC || POWERPC_AIX */
169 #  define FFI_TRAMPOLINE_SIZE 40
170 # endif
171 #endif
172 
173 #ifndef LIBFFI_ASM
174 #if defined(POWERPC_DARWIN) || defined(POWERPC_AIX)
175 struct ffi_aix_trampoline_struct {
176     void * code_pointer;	/* Pointer to ffi_closure_ASM */
177     void * toc;			/* TOC */
178     void * static_chain;	/* Pointer to closure */
179 };
180 #endif
181 #endif
182 
183 #endif
184