Mercurial > hg > CbC > CbC_gcc
comparison gcc/config/alpha/osf.h @ 0:a06113de4d67
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author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
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children | 77e2b8dfacca |
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1 /* Definitions of target machine for GNU compiler, for DEC Alpha on OSF/1. | |
2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2001, 2002, 2003, | |
3 2004, 2007 Free Software Foundation, Inc. | |
4 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu) | |
5 | |
6 This file is part of GCC. | |
7 | |
8 GCC is free software; you can redistribute it and/or modify | |
9 it under the terms of the GNU General Public License as published by | |
10 the Free Software Foundation; either version 3, or (at your option) | |
11 any later version. | |
12 | |
13 GCC is distributed in the hope that it will be useful, | |
14 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 GNU General Public License for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
19 along with GCC; see the file COPYING3. If not see | |
20 <http://www.gnu.org/licenses/>. */ | |
21 | |
22 /* As of OSF 4.0, as can subtract adjacent labels. */ | |
23 | |
24 #undef TARGET_AS_CAN_SUBTRACT_LABELS | |
25 #define TARGET_AS_CAN_SUBTRACT_LABELS 1 | |
26 | |
27 /* The GEM libraries for X_float are present, though not used by C. */ | |
28 | |
29 #undef TARGET_HAS_XFLOATING_LIBS | |
30 #define TARGET_HAS_XFLOATING_LIBS 1 | |
31 | |
32 /* Names to predefine in the preprocessor for this target machine. */ | |
33 | |
34 #define TARGET_OS_CPP_BUILTINS() \ | |
35 do { \ | |
36 builtin_define_std ("unix"); \ | |
37 builtin_define_std ("SYSTYPE_BSD"); \ | |
38 builtin_define ("_SYSTYPE_BSD"); \ | |
39 builtin_define ("__osf__"); \ | |
40 builtin_define ("__digital__"); \ | |
41 builtin_define ("__arch64__"); \ | |
42 builtin_define ("_LONGLONG"); \ | |
43 builtin_assert ("system=unix"); \ | |
44 builtin_assert ("system=xpg4"); \ | |
45 /* Tru64 UNIX V5 has a 16 byte long \ | |
46 double type and requires __X_FLOAT \ | |
47 to be defined for <math.h>. */ \ | |
48 if (LONG_DOUBLE_TYPE_SIZE == 128) \ | |
49 builtin_define ("__X_FLOAT"); \ | |
50 \ | |
51 /* Tru64 UNIX V4/V5 provide several ISO C94 \ | |
52 features protected by the corresponding \ | |
53 __STDC_VERSION__ macro. libstdc++ v3 \ | |
54 needs them as well. */ \ | |
55 if (c_dialect_cxx ()) \ | |
56 builtin_define ("__STDC_VERSION__=199409L"); \ | |
57 } while (0) | |
58 | |
59 /* Accept DEC C flags for multithreaded programs. We use _PTHREAD_USE_D4 | |
60 instead of PTHREAD_USE_D4 since both have the same effect and the former | |
61 doesn't invade the users' namespace. */ | |
62 | |
63 #undef CPP_SPEC | |
64 #define CPP_SPEC \ | |
65 "%{pthread|threads:-D_REENTRANT} %{threads:-D_PTHREAD_USE_D4}" | |
66 | |
67 /* Under OSF4, -p and -pg require -lprof1, and -lprof1 requires -lpdf. */ | |
68 | |
69 #define LIB_SPEC \ | |
70 "%{p|pg:-lprof1%{pthread|threads:_r} -lpdf} %{a:-lprof2} \ | |
71 %{threads: -lpthreads} %{pthread|threads: -lpthread -lmach -lexc} -lc" | |
72 | |
73 /* Pass "-G 8" to ld because Alpha's CC does. Pass -O3 if we are | |
74 optimizing, -O1 if we are not. Pass -S to silence `weak symbol | |
75 multiply defined' warnings. Pass -shared, -non_shared or | |
76 -call_shared as appropriate. Pass -hidden_symbol so that our | |
77 constructor and call-frame data structures are not accidentally | |
78 overridden. */ | |
79 #define LINK_SPEC \ | |
80 "-G 8 %{O*:-O3} %{!O*:-O1} -S %{static:-non_shared} \ | |
81 %{!static:%{shared:-shared -hidden_symbol _GLOBAL_*} \ | |
82 %{!shared:-call_shared}} %{pg} %{taso} %{rpath*}" | |
83 | |
84 #define STARTFILE_SPEC \ | |
85 "%{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}" | |
86 | |
87 #define ENDFILE_SPEC \ | |
88 "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}" | |
89 | |
90 #define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/" | |
91 | |
92 /* Tru64 UNIX V5.1 requires a special as flag. Empty by default. */ | |
93 | |
94 #define ASM_OLDAS_SPEC "" | |
95 | |
96 /* In OSF/1 v3.2c, the assembler by default does not output file names which | |
97 causes mips-tfile to fail. Passing -g to the assembler fixes this problem. | |
98 ??? Strictly speaking, we need -g only if the user specifies -g. Passing | |
99 it always means that we get slightly larger than necessary object files | |
100 if the user does not specify -g. If we don't pass -g, then mips-tfile | |
101 will need to be fixed to work in this case. Pass -O0 since some | |
102 optimization are broken and don't help us anyway. Pass -nocpp because | |
103 there's no point in running CPP on our assembler output. */ | |
104 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0 | |
105 #define ASM_SPEC "%{malpha-as:-g %(asm_oldas) -nocpp %{pg} -O0}" | |
106 #else | |
107 #define ASM_SPEC "%{!mgas:-g %(asm_oldas) -nocpp %{pg} -O0}" | |
108 #endif | |
109 | |
110 /* Specify to run a post-processor, mips-tfile after the assembler | |
111 has run to stuff the ecoff debug information into the object file. | |
112 This is needed because the Alpha assembler provides no way | |
113 of specifying such information in the assembly file. */ | |
114 | |
115 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0 | |
116 | |
117 #define ASM_FINAL_SPEC "\ | |
118 %{malpha-as: %{!mno-mips-tfile: \ | |
119 \n mips-tfile %{v*: -v} \ | |
120 %{K: -I %b.o~} \ | |
121 %{!K: %{save-temps: -I %b.o~}} \ | |
122 %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \ | |
123 %{,assembler:%i;:%g.s}}}" | |
124 | |
125 #else | |
126 #define ASM_FINAL_SPEC "\ | |
127 %{!mgas: %{!mno-mips-tfile: \ | |
128 \n mips-tfile %{v*: -v} \ | |
129 %{K: -I %b.o~} \ | |
130 %{!K: %{save-temps: -I %b.o~}} \ | |
131 %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \ | |
132 %{,assembler:%i;:%g.s}}}" | |
133 | |
134 #endif | |
135 | |
136 #undef EXTRA_SPECS | |
137 #define EXTRA_SPECS { "asm_oldas", ASM_OLDAS_SPEC } | |
138 | |
139 /* Indicate that we have a stamp.h to use. */ | |
140 #ifndef CROSS_DIRECTORY_STRUCTURE | |
141 #define HAVE_STAMP_H 1 | |
142 #endif | |
143 | |
144 /* Attempt to turn on access permissions for the stack. */ | |
145 | |
146 #define ENABLE_EXECUTE_STACK \ | |
147 void \ | |
148 __enable_execute_stack (void *addr) \ | |
149 { \ | |
150 extern int mprotect (const void *, size_t, int); \ | |
151 long size = getpagesize (); \ | |
152 long mask = ~(size-1); \ | |
153 char *page = (char *) (((long) addr) & mask); \ | |
154 char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \ | |
155 \ | |
156 /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \ | |
157 if (mprotect (page, end - page, 7) < 0) \ | |
158 perror ("mprotect of trampoline code"); \ | |
159 } | |
160 | |
161 /* Digital UNIX V4.0E (1091)/usr/include/sys/types.h 4.3.49.9 1997/08/14 */ | |
162 #define SIZE_TYPE "long unsigned int" | |
163 #define PTRDIFF_TYPE "long int" | |
164 | |
165 /* The linker will stick __main into the .init section. */ | |
166 #define HAS_INIT_SECTION | |
167 #define LD_INIT_SWITCH "-init" | |
168 #define LD_FINI_SWITCH "-fini" | |
169 | |
170 /* The linker needs a space after "-o". This allows -oldstyle_liblookup to | |
171 be passed to ld. */ | |
172 #define SWITCHES_NEED_SPACES "o" | |
173 | |
174 /* Select a format to encode pointers in exception handling data. CODE | |
175 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is | |
176 true if the symbol may be affected by dynamic relocations. | |
177 | |
178 We really ought to be using the SREL32 relocations that ECOFF has, | |
179 but no version of the native assembler supports creating such things, | |
180 and Compaq has no plans to rectify this. Worse, the dynamic loader | |
181 cannot handle unaligned relocations, so we have to make sure that | |
182 things get padded appropriately. */ | |
183 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ | |
184 (TARGET_GAS \ | |
185 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \ | |
186 : DW_EH_PE_aligned) | |
187 | |
188 /* This is how we tell the assembler that a symbol is weak. */ | |
189 | |
190 #define ASM_OUTPUT_WEAK_ALIAS(FILE, NAME, VALUE) \ | |
191 do \ | |
192 { \ | |
193 (*targetm.asm_out.globalize_label) (FILE, NAME); \ | |
194 fputs ("\t.weakext\t", FILE); \ | |
195 assemble_name (FILE, NAME); \ | |
196 if (VALUE) \ | |
197 { \ | |
198 fputc (' ', FILE); \ | |
199 assemble_name (FILE, VALUE); \ | |
200 } \ | |
201 fputc ('\n', FILE); \ | |
202 } \ | |
203 while (0) | |
204 | |
205 #define ASM_WEAKEN_LABEL(FILE, NAME) ASM_OUTPUT_WEAK_ALIAS(FILE, NAME, 0) | |
206 | |
207 /* Handle #pragma weak and #pragma pack. */ | |
208 #define HANDLE_SYSV_PRAGMA 1 | |
209 | |
210 /* Handle #pragma extern_prefix. Technically only needed for Tru64 5.x, | |
211 but easier to manipulate preprocessor bits from here. */ | |
212 #define TARGET_HANDLE_PRAGMA_EXTERN_PREFIX 1 |