1 /* Definitions of target machine GNU compiler. 32bit VMS version.
2 Copyright (C) 2009-2014 Free Software Foundation, Inc.
3 Contributed by Douglas B Rupp (rupp@gnat.com).
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
25 #include "stringpool.h"
26 #include "vms-protos.h"
31 #include "dwarf2out.h"
33 /* Correlation of standard CRTL names with DECCRTL function names. */
35 /* Name is for a function that allocate memory. Use the 64bit version
37 #define VMS_CRTL_MALLOC (1 << 0)
39 /* If long pointer are enabled, use _NAME64 instead. */
40 #define VMS_CRTL_64 (1 << 1)
42 /* Prepend s/f before the name. To be applied after the previous rule.
43 use 's' for S float, 'f' for IEEE 32. */
44 #define VMS_CRTL_FLOAT32 (1 << 2)
46 /* Prepend t/g/d before the name. To be applied after the previous rule.
47 use 'g' for VAX G float, 'd' for VAX D float, 't' for IEEE 64. */
48 #define VMS_CRTL_FLOAT64 (1 << 3)
50 /* Prepend d before the name, only if using VAX fp. */
51 #define VMS_CRTL_FLOAT64_VAXD (1 << 4)
53 /* Prepend x before the name for if 128 bit long doubles are enabled. This
54 concern mostly 'printf'-like functions. */
55 #define VMS_CRTL_FLOAT128 (1 << 5)
57 /* From xxx, create xxx, xxxf, xxxl using MATH$XXX_T, MATH$XXX_S
58 and MATH$XXX{_X} if DPML is used. */
59 #define VMS_CRTL_DPML (1 << 6)
61 /* Together with DPML, it means that all variant (ie xxx, xxxf and xxxl) are
62 overridden by decc. Without DPML, it means this is a variant (ie xxxf
63 or xxxl) of a function. */
64 #define VMS_CRTL_NODPML (1 << 7)
66 /* Prepend __bsd44_ before the name. To be applied after the P64
68 #define VMS_CRTL_BSD44 (1 << 8)
70 /* Define only in 32 bits mode, as this has no 64 bit variants.
71 Concerns getopt/getarg. */
72 #define VMS_CRTL_32ONLY (1 << 9)
74 /* GLobal data prefix (ga_, gl_...) */
75 #define VMS_CRTL_G_MASK (7 << 10)
76 #define VMS_CRTL_G_NONE (0 << 10)
77 #define VMS_CRTL_GA (1 << 10)
78 #define VMS_CRTL_GL (2 << 10)
80 /* Append '_2'. Not compatible with 64. */
81 #define VMS_CRTL_FLOATV2 (1 << 13)
85 /* The standard C name. */
86 const char *const name
;
88 /* Flags to drive the translation. */
92 /* Map for the translation. */
94 static const struct vms_crtl_name vms_crtl_names
[] =
96 #include "vms-crtlmap.h"
99 /* Number of entires in the above array. */
101 #define NBR_CRTL_NAMES (sizeof (vms_crtl_names) / sizeof (*vms_crtl_names))
103 /* List of aliased identifiers. They must be persistent across gc. */
105 static GTY(()) vec
<tree
, va_gc
> *aliases_id
;
107 /* Add a CRTL translation. This simply use the transparent alias
108 mechanism, which is platform independent and works with the
109 #pragma extern_prefix (which set the assembler name). */
112 vms_add_crtl_xlat (const char *name
, size_t nlen
,
113 const char *id_str
, size_t id_len
)
117 /* printf ("vms crtl: %.*s -> %.*s\n", nlen, name, id_len, id_str); */
119 targ
= get_identifier_with_length (name
, nlen
);
120 gcc_assert (!IDENTIFIER_TRANSPARENT_ALIAS (targ
));
121 IDENTIFIER_TRANSPARENT_ALIAS (targ
) = 1;
122 TREE_CHAIN (targ
) = get_identifier_with_length (id_str
, id_len
);
124 vec_safe_push (aliases_id
, targ
);
127 /* Do VMS specific stuff on builtins: disable the ones that are not
128 standard, mangle names. */
131 vms_patch_builtins (void)
133 /* enum built_in_function bi; */
136 /* Fwrite on VMS is non-standard. */
137 if (builtin_decl_implicit_p (BUILT_IN_FWRITE
))
138 set_builtin_decl_implicit_p (BUILT_IN_FWRITE
, false);
140 if (builtin_decl_implicit_p (BUILT_IN_FWRITE_UNLOCKED
))
141 set_builtin_decl_implicit_p (BUILT_IN_FWRITE_UNLOCKED
, false);
143 /* Define aliases for names. */
144 for (i
= 0; i
< NBR_CRTL_NAMES
; i
++)
146 const struct vms_crtl_name
*n
= &vms_crtl_names
[i
];
147 char res
[VMS_CRTL_MAXLEN
+ 3 + 9 + 1 + 1];
149 int nlen
= strlen (n
->name
);
151 /* Discard 32ONLY if using 64 bit pointers. */
152 if ((n
->flags
& VMS_CRTL_32ONLY
)
153 && flag_vms_pointer_size
== VMS_POINTER_SIZE_64
)
156 /* Handle DPML unless overridden by decc. */
157 if ((n
->flags
& VMS_CRTL_DPML
)
158 && !(n
->flags
& VMS_CRTL_NODPML
))
161 char alt
[VMS_CRTL_MAXLEN
+ 3];
163 memcpy (res
, "MATH$", 5);
165 for (p
= n
->name
; *p
; p
++)
166 res
[rlen
++] = TOUPPER (*p
);
170 /* Double version. */
171 if (!(n
->flags
& VMS_CRTL_FLOAT64
))
172 vms_add_crtl_xlat (n
->name
, nlen
, res
, rlen
);
176 memcpy (alt
, n
->name
, nlen
);
178 vms_add_crtl_xlat (alt
, nlen
+ 1, res
, rlen
);
180 /* Long double version. */
181 res
[rlen
- 1] = (LONG_DOUBLE_TYPE_SIZE
== 128 ? 'X' : 'T');
183 vms_add_crtl_xlat (alt
, nlen
+ 1, res
, rlen
);
185 if (!(n
->flags
& (VMS_CRTL_FLOAT32
| VMS_CRTL_FLOAT64
)))
189 if (n
->flags
& VMS_CRTL_FLOAT64_VAXD
)
192 /* Add the dec-c prefix. */
193 memcpy (res
, "decc$", 5);
196 if (n
->flags
& VMS_CRTL_BSD44
)
198 memcpy (res
+ rlen
, "__bsd44_", 8);
202 if ((n
->flags
& VMS_CRTL_G_MASK
) != VMS_CRTL_G_NONE
)
205 switch (n
->flags
& VMS_CRTL_G_MASK
)
219 if (n
->flags
& VMS_CRTL_FLOAT32
)
222 if (n
->flags
& VMS_CRTL_FLOAT64
)
225 if ((n
->flags
& VMS_CRTL_FLOAT128
) && LONG_DOUBLE_TYPE_SIZE
== 128)
228 memcpy (res
+ rlen
, n
->name
, nlen
);
230 if ((n
->flags
& VMS_CRTL_64
) == 0)
234 if (n
->flags
& VMS_CRTL_FLOATV2
)
239 vms_add_crtl_xlat (n
->name
, nlen
, res
, rlen
);
243 char alt
[VMS_CRTL_MAXLEN
+ 3];
246 /* Add three translations:
249 X -> X if short, _X64 if long. */
251 memcpy (alt
+ 1, n
->name
, nlen
);
252 alt
[1 + nlen
+ 0] = '3';
253 alt
[1 + nlen
+ 1] = '2';
254 alt
[1 + nlen
+ 2] = 0;
255 vms_add_crtl_xlat (alt
, nlen
+ 3, res
, rlen
+ nlen
);
257 use_64
= (((n
->flags
& VMS_CRTL_64
)
258 && flag_vms_pointer_size
== VMS_POINTER_SIZE_64
)
259 || ((n
->flags
& VMS_CRTL_MALLOC
)
261 && flag_vms_pointer_size
!= VMS_POINTER_SIZE_NONE
));
263 vms_add_crtl_xlat (n
->name
, nlen
, res
, rlen
+ nlen
);
266 memcpy (res
+ rlen
, n
->name
, nlen
);
267 res
[rlen
+ nlen
+ 0] = '6';
268 res
[rlen
+ nlen
+ 1] = '4';
271 vms_add_crtl_xlat (n
->name
, nlen
, res
, rlen
+ nlen
+ 2);
273 alt
[1 + nlen
+ 0] = '6';
274 alt
[1 + nlen
+ 1] = '4';
275 vms_add_crtl_xlat (alt
, nlen
+ 3, res
, rlen
+ nlen
+ 2);
280 /* Always default to .text section. */
283 vms_function_section (tree decl ATTRIBUTE_UNUSED
,
284 enum node_frequency freq ATTRIBUTE_UNUSED
,
285 bool startup ATTRIBUTE_UNUSED
,
286 bool exit ATTRIBUTE_UNUSED
)
291 /* Additionnal VMS specific code for start_function. */
293 /* Must be kept in sync with libgcc/config/vms/vms-ucrt0.c */
294 #define VMS_MAIN_FLAGS_SYMBOL "__gcc_main_flags"
295 #define MAIN_FLAG_64BIT (1 << 0)
296 #define MAIN_FLAG_POSIX (1 << 1)
299 vms_start_function (const char *fnname
)
301 #if VMS_DEBUGGING_INFO
303 && debug_info_level
> DINFO_LEVEL_NONE
304 && strncmp (vms_debug_main
, fnname
, strlen (vms_debug_main
)) == 0)
306 targetm
.asm_out
.globalize_label (asm_out_file
, VMS_DEBUG_MAIN_POINTER
);
307 ASM_OUTPUT_DEF (asm_out_file
, VMS_DEBUG_MAIN_POINTER
, fnname
);
308 dwarf2out_vms_debug_main_pointer ();
313 /* Registers flags used for function main. This is necessary for
315 if (strcmp (fnname
, "main") == 0)
317 unsigned int flags
= 0;
319 if (flag_vms_pointer_size
== VMS_POINTER_SIZE_64
)
320 flags
|= MAIN_FLAG_64BIT
;
321 if (!flag_vms_return_codes
)
322 flags
|= MAIN_FLAG_POSIX
;
324 targetm
.asm_out
.globalize_label (asm_out_file
, VMS_MAIN_FLAGS_SYMBOL
);
325 assemble_name (asm_out_file
, VMS_MAIN_FLAGS_SYMBOL
);
326 fprintf (asm_out_file
, " = %u\n", flags
);