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8c200350 RO |
1 | /* Definitions of target machine for GNU compiler, for DEC Alpha on |
2 | Tru64 UNIX V5.1. | |
3 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, | |
4 | 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 | |
5 | Free Software Foundation, Inc. | |
6 | Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu) | |
5495cc55 | 7 | |
8c200350 | 8 | This file is part of GCC. |
5495cc55 | 9 | |
8c200350 RO |
10 | GCC is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3, or (at your option) | |
13 | any later version. | |
5495cc55 | 14 | |
8c200350 RO |
15 | GCC is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
5495cc55 | 19 | |
8c200350 | 20 | You should have received a copy of the GNU General Public License |
2f83c7d6 NC |
21 | along with GCC; see the file COPYING3. If not see |
22 | <http://www.gnu.org/licenses/>. */ | |
5495cc55 | 23 | |
8c200350 RO |
24 | /* As of DEC OSF/1 V4.0, as can subtract adjacent labels. */ |
25 | ||
26 | #undef TARGET_AS_CAN_SUBTRACT_LABELS | |
27 | #define TARGET_AS_CAN_SUBTRACT_LABELS 1 | |
28 | ||
29 | /* The GEM libraries for X_float are present, though not used by C. */ | |
30 | ||
31 | #undef TARGET_HAS_XFLOATING_LIBS | |
32 | #define TARGET_HAS_XFLOATING_LIBS 1 | |
33 | ||
34 | /* Tru64 UNIX V5.1 uses IEEE QUAD format. */ | |
0f15adbd | 35 | #undef TARGET_DEFAULT |
8bea7f7c | 36 | #define TARGET_DEFAULT (MASK_FPREGS | MASK_LONG_DOUBLE_128) |
5076b0ea | 37 | |
8c200350 RO |
38 | /* The linker appears to perform invalid code optimizations that result |
39 | in the ldgp emitted for the exception_receiver pattern being incorrectly | |
40 | linked. */ | |
41 | #undef TARGET_LD_BUGGY_LDGP | |
42 | #define TARGET_LD_BUGGY_LDGP 1 | |
43 | ||
44 | /* Tru64 UNIX V5.1 has the float and long double forms of math functions. */ | |
45 | #undef TARGET_C99_FUNCTIONS | |
46 | #define TARGET_C99_FUNCTIONS 1 | |
47 | ||
48 | /* Names to predefine in the preprocessor for this target machine. */ | |
49 | ||
50 | #define TARGET_OS_CPP_BUILTINS() \ | |
51 | do { \ | |
52 | builtin_define_std ("unix"); \ | |
53 | builtin_define_std ("SYSTYPE_BSD"); \ | |
54 | builtin_define ("_SYSTYPE_BSD"); \ | |
55 | builtin_define ("__osf__"); \ | |
56 | builtin_define ("__digital__"); \ | |
57 | builtin_define ("__arch64__"); \ | |
58 | builtin_define ("_LONGLONG"); \ | |
59 | builtin_assert ("system=unix"); \ | |
60 | builtin_assert ("system=xpg4"); \ | |
61 | /* Tru64 UNIX V5 has a 16 byte long \ | |
62 | double type and requires __X_FLOAT \ | |
63 | to be defined for <math.h>. */ \ | |
64 | if (LONG_DOUBLE_TYPE_SIZE == 128) \ | |
65 | builtin_define ("__X_FLOAT"); \ | |
66 | \ | |
67 | /* Tru64 UNIX V4/V5 provide several ISO C94 \ | |
68 | features protected by the corresponding \ | |
69 | __STDC_VERSION__ macro. libstdc++ v3 \ | |
70 | needs them as well. */ \ | |
71 | if (c_dialect_cxx ()) \ | |
72 | builtin_define ("__STDC_VERSION__=199409L"); \ | |
73 | } while (0) | |
74 | ||
75 | /* Accept DEC C flags for multithreaded programs. We use _PTHREAD_USE_D4 | |
76 | instead of PTHREAD_USE_D4 since both have the same effect and the former | |
77 | doesn't invade the users' namespace. */ | |
78 | ||
79 | #undef CPP_SPEC | |
80 | #define CPP_SPEC \ | |
81 | "%{pthread|threads:-D_REENTRANT} %{threads:-D_PTHREAD_USE_D4}" | |
82 | ||
83 | /* Under DEC OSF/1 V4, -p and -pg require -lprof1, and -lprof1 requires | |
84 | -lpdf. */ | |
85 | ||
86 | #define LIB_SPEC \ | |
1890bccc | 87 | "%{p|pg:-lprof1%{pthread|threads:_r} -lpdf} \ |
8c200350 RO |
88 | %{threads: -lpthreads} %{pthread|threads: -lpthread -lmach -lexc} -lc" |
89 | ||
90 | /* Pass "-G 8" to ld because Alpha's CC does. Pass -O3 if we are | |
91 | optimizing, -O1 if we are not. Pass -S to silence `weak symbol | |
92 | multiply defined' warnings. Pass -shared, -non_shared or | |
93 | -call_shared as appropriate. Pass -hidden_symbol so that our | |
94 | constructor and call-frame data structures are not accidentally | |
95 | overridden. */ | |
96 | #define LINK_SPEC \ | |
97 | "-G 8 %{O*:-O3} %{!O*:-O1} -S %{static:-non_shared} \ | |
98 | %{!static:%{shared:-shared -hidden_symbol _GLOBAL_*} \ | |
99 | %{!shared:-call_shared}} %{pg} %{taso} %{rpath*}" | |
100 | ||
101 | #define STARTFILE_SPEC \ | |
102 | "%{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}" | |
103 | ||
104 | #define ENDFILE_SPEC \ | |
105 | "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}" | |
106 | ||
107 | #define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/" | |
108 | ||
5076b0ea RO |
109 | /* In Tru64 UNIX V5.1, Compaq introduced a new assembler |
110 | (/usr/lib/cmplrs/cc/adu) which currently (versions between 3.04.29 and | |
111 | 3.04.32) breaks mips-tfile. Passing the undocumented -oldas flag reverts | |
112 | to using the old assembler (/usr/lib/cmplrs/cc/as[01]). | |
113 | ||
5076b0ea RO |
114 | It is clearly not desirable to depend on this undocumented flag, and |
115 | Compaq wants -oldas to go away soon, but until they have released a | |
ad5ef673 RH |
116 | new adu that works with mips-tfile, this is the only option. |
117 | ||
118 | In some versions of the DTK, the assembler driver invokes ld after | |
119 | assembly. This has been fixed in current versions, but adding -c | |
120 | works as expected for all versions. */ | |
5076b0ea | 121 | |
ad5ef673 | 122 | #define ASM_OLDAS_SPEC "-oldas -c" |
ccb83cbc | 123 | |
8c200350 RO |
124 | /* In OSF/1 v3.2c, the assembler by default does not output file names which |
125 | causes mips-tfile to fail. Passing -g to the assembler fixes this problem. | |
126 | ??? Strictly speaking, we need -g only if the user specifies -g. Passing | |
127 | it always means that we get slightly larger than necessary object files | |
128 | if the user does not specify -g. If we don't pass -g, then mips-tfile | |
129 | will need to be fixed to work in this case. Pass -O0 since some | |
95b53b57 | 130 | optimization are broken and don't help us anyway. */ |
8c200350 | 131 | #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0 |
95b53b57 | 132 | #define ASM_SPEC "%{malpha-as:-g " ASM_OLDAS_SPEC " %{pg} -O0}" |
8c200350 | 133 | #else |
95b53b57 | 134 | #define ASM_SPEC "%{!mgas:-g " ASM_OLDAS_SPEC " %{pg} -O0}" |
8c200350 | 135 | #endif |
46512942 | 136 | |
8c200350 RO |
137 | /* Specify to run a post-processor, mips-tfile after the assembler |
138 | has run to stuff the ecoff debug information into the object file. | |
139 | This is needed because the Alpha assembler provides no way | |
140 | of specifying such information in the assembly file. */ | |
141 | ||
142 | #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0 | |
143 | ||
144 | #define ASM_FINAL_SPEC "\ | |
145 | %{malpha-as: %{!mno-mips-tfile: \ | |
146 | \n mips-tfile %{v*: -v} \ | |
147 | %{K: -I %b.o~} \ | |
148 | %{!K: %{save-temps: -I %b.o~}} \ | |
149 | %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \ | |
150 | %{,assembler:%i;:%g.s}}}" | |
151 | ||
152 | #else | |
153 | #define ASM_FINAL_SPEC "\ | |
154 | %{!mgas: %{!mno-mips-tfile: \ | |
155 | \n mips-tfile %{v*: -v} \ | |
156 | %{K: -I %b.o~} \ | |
157 | %{!K: %{save-temps: -I %b.o~}} \ | |
158 | %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \ | |
159 | %{,assembler:%i;:%g.s}}}" | |
160 | ||
161 | #endif | |
162 | ||
163 | /* Indicate that we have a stamp.h to use. */ | |
164 | #ifndef CROSS_DIRECTORY_STRUCTURE | |
165 | #define HAVE_STAMP_H 1 | |
166 | #endif | |
167 | ||
168 | /* Attempt to turn on access permissions for the stack. */ | |
169 | ||
170 | #define ENABLE_EXECUTE_STACK \ | |
171 | void \ | |
172 | __enable_execute_stack (void *addr) \ | |
173 | { \ | |
174 | extern int mprotect (const void *, size_t, int); \ | |
175 | long size = getpagesize (); \ | |
176 | long mask = ~(size-1); \ | |
177 | char *page = (char *) (((long) addr) & mask); \ | |
178 | char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \ | |
179 | \ | |
180 | /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \ | |
181 | if (mprotect (page, end - page, 7) < 0) \ | |
182 | perror ("mprotect of trampoline code"); \ | |
183 | } | |
184 | ||
185 | /* Digital UNIX V4.0E (1091)/usr/include/sys/types.h 4.3.49.9 1997/08/14 */ | |
186 | #define SIZE_TYPE "long unsigned int" | |
187 | #define PTRDIFF_TYPE "long int" | |
188 | ||
189 | #define SIG_ATOMIC_TYPE "int" | |
190 | ||
191 | #define INT8_TYPE "signed char" | |
192 | #define INT16_TYPE "short int" | |
193 | #define INT32_TYPE "int" | |
194 | #define INT64_TYPE "long int" | |
195 | #define UINT8_TYPE "unsigned char" | |
196 | #define UINT16_TYPE "short unsigned int" | |
197 | #define UINT32_TYPE "unsigned int" | |
198 | #define UINT64_TYPE "long unsigned int" | |
199 | ||
200 | #define INT_LEAST8_TYPE "signed char" | |
201 | #define INT_LEAST16_TYPE "short int" | |
202 | #define INT_LEAST32_TYPE "int" | |
203 | #define INT_LEAST64_TYPE "long int" | |
204 | #define UINT_LEAST8_TYPE "unsigned char" | |
205 | #define UINT_LEAST16_TYPE "short unsigned int" | |
206 | #define UINT_LEAST32_TYPE "unsigned int" | |
207 | #define UINT_LEAST64_TYPE "long unsigned int" | |
208 | ||
209 | #define INT_FAST8_TYPE "signed char" | |
210 | #define INT_FAST16_TYPE "int" | |
211 | #define INT_FAST32_TYPE "int" | |
212 | #define INT_FAST64_TYPE "long int" | |
213 | #define UINT_FAST8_TYPE "unsigned char" | |
214 | #define UINT_FAST16_TYPE "unsigned int" | |
215 | #define UINT_FAST32_TYPE "unsigned int" | |
216 | #define UINT_FAST64_TYPE "long unsigned int" | |
217 | ||
218 | #define INTPTR_TYPE "long int" | |
219 | #define UINTPTR_TYPE "long unsigned int" | |
220 | ||
221 | /* The linker will stick __main into the .init section. */ | |
222 | #define HAS_INIT_SECTION | |
223 | #define LD_INIT_SWITCH "-init" | |
224 | #define LD_FINI_SWITCH "-fini" | |
225 | ||
226 | /* Select a format to encode pointers in exception handling data. CODE | |
227 | is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is | |
228 | true if the symbol may be affected by dynamic relocations. | |
229 | ||
230 | We really ought to be using the SREL32 relocations that ECOFF has, | |
231 | but no version of the native assembler supports creating such things, | |
232 | and Compaq has no plans to rectify this. Worse, the dynamic loader | |
233 | cannot handle unaligned relocations, so we have to make sure that | |
234 | things get padded appropriately. */ | |
235 | #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ | |
236 | (TARGET_GAS \ | |
237 | ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \ | |
238 | : DW_EH_PE_aligned) | |
239 | ||
902a51a1 RO |
240 | /* The Tru64 UNIX assembler warns on .lcomm with SIZE 0, so use 1 in that |
241 | case. */ | |
242 | #undef ASM_OUTPUT_LOCAL | |
243 | #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \ | |
244 | ( fputs ("\t.lcomm ", (FILE)), \ | |
245 | assemble_name ((FILE), (NAME)), \ | |
246 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE) ? (SIZE) : 1)) | |
247 | ||
8c200350 RO |
248 | /* This is how we tell the assembler that a symbol is weak. */ |
249 | ||
250 | #define ASM_OUTPUT_WEAK_ALIAS(FILE, NAME, VALUE) \ | |
251 | do \ | |
252 | { \ | |
253 | (*targetm.asm_out.globalize_label) (FILE, NAME); \ | |
254 | fputs ("\t.weakext\t", FILE); \ | |
255 | assemble_name (FILE, NAME); \ | |
256 | if (VALUE) \ | |
257 | { \ | |
258 | fputc (' ', FILE); \ | |
259 | assemble_name (FILE, VALUE); \ | |
260 | } \ | |
261 | fputc ('\n', FILE); \ | |
262 | } \ | |
263 | while (0) | |
264 | ||
265 | #define ASM_WEAKEN_LABEL(FILE, NAME) ASM_OUTPUT_WEAK_ALIAS(FILE, NAME, 0) | |
46512942 | 266 | |
fb8cbd3c RS |
267 | /* The native assembler doesn't understand parenthesis. */ |
268 | #define TARGET_ASM_OPEN_PAREN "" | |
269 | #define TARGET_ASM_CLOSE_PAREN "" | |
270 | ||
8c200350 RO |
271 | /* Handle #pragma extern_prefix. */ |
272 | #define TARGET_HANDLE_PRAGMA_EXTERN_PREFIX 1 | |
6c175675 OH |
273 | |
274 | #define MD_UNWIND_SUPPORT "config/alpha/osf5-unwind.h" |