Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/rs6000/aix.h @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | f6334be47118 |
| children | 84e7813d76e9 |
| rev | line source |
|---|---|
| 0 | 1 /* Definitions of target machine for GNU compiler, |
| 2 for IBM RS/6000 POWER running AIX. | |
| 111 | 3 Copyright (C) 2000-2017 Free Software Foundation, Inc. |
| 0 | 4 |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published | |
| 9 by the Free Software Foundation; either version 3, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
| 15 License for more details. | |
| 16 | |
| 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/>. */ | |
| 20 | |
| 21 /* Yes! We are AIX! */ | |
| 22 #define DEFAULT_ABI ABI_AIX | |
| 23 #undef TARGET_AIX | |
| 24 #define TARGET_AIX 1 | |
| 25 | |
|
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26 /* Linux64.h wants to redefine TARGET_AIX based on -m64, but it can't be used |
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27 in the #if conditional in options-default.h, so provide another macro. */ |
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28 #undef TARGET_AIX_OS |
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29 #define TARGET_AIX_OS 1 |
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30 |
| 0 | 31 /* AIX always has a TOC. */ |
| 32 #define TARGET_NO_TOC 0 | |
| 33 #define TARGET_TOC 1 | |
| 34 #define FIXED_R2 1 | |
| 35 | |
| 36 /* AIX allows r13 to be used in 32-bit mode. */ | |
| 37 #define FIXED_R13 0 | |
| 38 | |
| 39 /* 32-bit and 64-bit AIX stack boundary is 128. */ | |
| 40 #undef STACK_BOUNDARY | |
| 41 #define STACK_BOUNDARY 128 | |
| 42 | |
| 111 | 43 /* Offset within stack frame to start allocating local variables at. |
| 44 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
| 45 first local allocated. Otherwise, it is the offset to the BEGINNING | |
| 46 of the first local allocated. | |
| 47 | |
| 48 On the RS/6000, the frame pointer is the same as the stack pointer, | |
| 49 except for dynamic allocations. So we start after the fixed area and | |
| 50 outgoing parameter area. | |
| 51 | |
| 52 If the function uses dynamic stack space (CALLS_ALLOCA is set), that | |
| 53 space needs to be aligned to STACK_BOUNDARY, i.e. the sum of the | |
| 54 sizes of the fixed area and the parameter area must be a multiple of | |
| 55 STACK_BOUNDARY. */ | |
| 56 | |
| 57 #undef RS6000_STARTING_FRAME_OFFSET | |
| 58 #define RS6000_STARTING_FRAME_OFFSET \ | |
| 59 (cfun->calls_alloca \ | |
| 60 ? RS6000_ALIGN (crtl->outgoing_args_size + RS6000_SAVE_AREA, 16) \ | |
| 61 : (RS6000_ALIGN (crtl->outgoing_args_size, 16) + RS6000_SAVE_AREA)) | |
| 62 | |
| 63 /* Offset from the stack pointer register to an item dynamically | |
| 64 allocated on the stack, e.g., by `alloca'. | |
| 65 | |
| 66 The default value for this macro is `STACK_POINTER_OFFSET' plus the | |
| 67 length of the outgoing arguments. The default is correct for most | |
| 68 machines. See `function.c' for details. | |
| 69 | |
| 70 This value must be a multiple of STACK_BOUNDARY (hard coded in | |
| 71 `emit-rtl.c'). */ | |
| 72 #undef STACK_DYNAMIC_OFFSET | |
| 73 #define STACK_DYNAMIC_OFFSET(FUNDECL) \ | |
| 74 RS6000_ALIGN (crtl->outgoing_args_size + STACK_POINTER_OFFSET, 16) | |
| 75 | |
| 0 | 76 #undef TARGET_IEEEQUAD |
| 77 #define TARGET_IEEEQUAD 0 | |
| 78 | |
| 111 | 79 #undef TARGET_IEEEQUAD_DEFAULT |
| 80 #define TARGET_IEEEQUAD_DEFAULT 0 | |
| 81 | |
| 0 | 82 /* The AIX linker will discard static constructors in object files before |
| 83 collect has a chance to see them, so scan the object files directly. */ | |
| 84 #define COLLECT_EXPORT_LIST | |
| 85 | |
| 111 | 86 /* On AIX, initialisers specified with -binitfini are called in breadth-first |
| 87 order. | |
| 88 e.g. if a.out depends on lib1.so, the init function for a.out is called before | |
| 89 the init function for lib1.so. | |
| 90 | |
| 91 To ensure global C++ constructors in linked libraries are run before global | |
| 92 C++ constructors from the current module, there is additional symbol scanning | |
| 93 logic in collect2. | |
| 94 | |
| 95 The global initialiser/finaliser functions are named __GLOBAL_AIXI_{libname} | |
| 96 and __GLOBAL_AIXD_{libname} and are exported from each shared library. | |
| 97 | |
| 98 collect2 will detect these symbols when they exist in shared libraries that | |
| 99 the current program is being linked against. All such initiliser functions | |
| 100 will be called prior to the constructors of the current program, and | |
| 101 finaliser functions called after destructors. | |
| 102 | |
| 103 Reference counting generated by collect2 will ensure that constructors are | |
| 104 only invoked once in the case of multiple dependencies on a library. | |
| 105 | |
| 106 -binitfini is still used in parallel to this solution. | |
| 107 This handles the case where a library is loaded through dlopen(), and also | |
| 108 handles the option -blazy. | |
| 109 */ | |
| 110 #define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \ | |
| 111 fprintf ((STREAM), "void %s() {\n\t%s();\n}\n", aix_shared_initname, (FUNC)) | |
| 112 #define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \ | |
| 113 fprintf ((STREAM), "void %s() {\n\t%s();\n}\n", aix_shared_fininame, (FUNC)) | |
| 114 | |
|
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115 #if HAVE_AS_REF |
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116 /* Issue assembly directives that create a reference to the given DWARF table |
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117 identifier label from the current function section. This is defined to |
| 111 | 118 ensure we drag frame tables associated with needed function bodies in |
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119 a link with garbage collection activated. */ |
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120 #define ASM_OUTPUT_DWARF_TABLE_REF rs6000_aix_asm_output_dwarf_table_ref |
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121 #endif |
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122 |
| 0 | 123 /* This is the only version of nm that collect2 can work with. */ |
| 124 #define REAL_NM_FILE_NAME "/usr/ucb/nm" | |
| 125 | |
| 126 #define USER_LABEL_PREFIX "" | |
| 127 | |
| 128 /* Don't turn -B into -L if the argument specifies a relative file name. */ | |
| 129 #define RELATIVE_PREFIX_NOT_LINKDIR | |
| 130 | |
| 131 /* Because of the above, we must have gcc search itself to find libgcc.a. */ | |
| 132 #define LINK_LIBGCC_SPECIAL_1 | |
| 133 | |
| 134 /* Names to predefine in the preprocessor for this target machine. */ | |
| 135 #define TARGET_OS_AIX_CPP_BUILTINS() \ | |
| 136 do \ | |
| 137 { \ | |
| 138 builtin_define ("_IBMR2"); \ | |
| 139 builtin_define ("_POWER"); \ | |
| 111 | 140 builtin_define ("__unix__"); \ |
| 0 | 141 builtin_define ("_AIX"); \ |
| 142 builtin_define ("_AIX32"); \ | |
| 143 builtin_define ("_AIX41"); \ | |
| 144 builtin_define ("_LONG_LONG"); \ | |
| 145 if (TARGET_LONG_DOUBLE_128) \ | |
| 146 builtin_define ("__LONGDOUBLE128"); \ | |
| 147 builtin_assert ("system=unix"); \ | |
| 148 builtin_assert ("system=aix"); \ | |
| 111 | 149 if (TARGET_64BIT) \ |
| 150 { \ | |
| 151 builtin_define ("__PPC__"); \ | |
| 152 builtin_define ("__PPC64__"); \ | |
| 153 builtin_define ("__powerpc__"); \ | |
| 154 builtin_define ("__powerpc64__"); \ | |
| 155 builtin_assert ("cpu=powerpc64"); \ | |
| 156 builtin_assert ("machine=powerpc64"); \ | |
| 157 } \ | |
| 158 else \ | |
| 159 { \ | |
| 160 builtin_define ("__PPC__"); \ | |
| 161 builtin_define ("__powerpc__"); \ | |
| 162 builtin_assert ("cpu=powerpc"); \ | |
| 163 builtin_assert ("machine=powerpc"); \ | |
| 164 } \ | |
| 0 | 165 } \ |
| 166 while (0) | |
| 167 | |
| 168 /* Define appropriate architecture macros for preprocessor depending on | |
| 169 target switches. */ | |
| 170 | |
| 171 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}\ | |
| 172 %{ansi: -D_ANSI_C_SOURCE}" | |
| 173 | |
| 174 #define CC1_SPEC "%(cc1_cpu)" | |
| 175 | |
| 176 #undef ASM_DEFAULT_SPEC | |
| 177 #define ASM_DEFAULT_SPEC "" | |
| 178 | |
| 179 /* Tell the assembler to assume that all undefined names are external. | |
| 180 | |
| 181 Don't do this until the fixed IBM assembler is more generally available. | |
| 182 When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL, | |
| 183 ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no | |
| 184 longer be needed. Also, the extern declaration of mcount in | |
| 185 rs6000_xcoff_file_start will no longer be needed. */ | |
| 186 | |
| 187 /* #define ASM_SPEC "-u %(asm_cpu)" */ | |
| 188 | |
| 189 /* Default location of syscalls.exp under AIX */ | |
|
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190 #define LINK_SYSCALLS_SPEC "-bI:%R/lib/syscalls.exp" |
| 0 | 191 |
| 192 /* Default location of libg.exp under AIX */ | |
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193 #define LINK_LIBG_SPEC "-bexport:%R/usr/lib/libg.exp" |
| 0 | 194 |
| 195 /* Define the options for the binder: Start text at 512, align all segments | |
| 196 to 512 bytes, and warn if there is text relocation. | |
| 197 | |
| 198 The -bhalt:4 option supposedly changes the level at which ld will abort, | |
| 199 but it also suppresses warnings about multiply defined symbols and is | |
| 200 used by the AIX cc command. So we use it here. | |
| 201 | |
| 202 -bnodelcsect undoes a poor choice of default relating to multiply-defined | |
| 203 csects. See AIX documentation for more information about this. | |
| 204 | |
| 205 -bM:SRE tells the linker that the output file is Shared REusable. Note | |
| 206 that to actually build a shared library you will also need to specify an | |
| 207 export list with the -Wl,-bE option. */ | |
| 208 | |
| 209 #define LINK_SPEC "-T512 -H512 %{!r:-btextro} -bhalt:4 -bnodelcsect\ | |
| 210 %{static:-bnso %(link_syscalls) } \ | |
| 211 %{!shared:%{g*: %(link_libg) }} %{shared:-bM:SRE}" | |
| 212 | |
| 213 /* Profiled library versions are used by linking with special directories. */ | |
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214 #define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\ |
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215 %{p:-L%R/lib/profiled -L%R/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc" |
| 0 | 216 |
| 217 /* Static linking with shared libstdc++ requires libsupc++ as well. */ | |
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218 #define LIBSTDCXX_STATIC "supc++" |
| 0 | 219 |
| 220 /* This now supports a natural alignment mode. */ | |
| 221 /* AIX word-aligns FP doubles but doubleword-aligns 64-bit ints. */ | |
| 111 | 222 #define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \ |
| 0 | 223 ((TARGET_ALIGN_NATURAL == 0 \ |
| 111 | 224 && TYPE_MODE (strip_array_types (TYPE)) == DFmode) \ |
| 0 | 225 ? MIN ((COMPUTED), 32) \ |
| 226 : (COMPUTED)) | |
| 227 | |
| 228 /* AIX increases natural record alignment to doubleword if the first | |
| 229 field is an FP double while the FP fields remain word aligned. */ | |
| 230 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ | |
| 231 ((TREE_CODE (STRUCT) == RECORD_TYPE \ | |
| 232 || TREE_CODE (STRUCT) == UNION_TYPE \ | |
| 233 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \ | |
| 234 && TARGET_ALIGN_NATURAL == 0 \ | |
| 235 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \ | |
| 236 : MAX ((COMPUTED), (SPECIFIED))) | |
| 237 | |
| 238 /* The AIX ABI isn't explicit on whether aggregates smaller than a | |
| 239 word/doubleword should be padded upward or downward. One could | |
| 240 reasonably assume that they follow the normal rules for structure | |
| 241 layout treating the parameter area as any other block of memory, | |
| 242 then map the reg param area to registers, i.e., pad upward, which | |
| 243 is the way IBM Compilers for AIX behave. | |
| 244 Setting both of the following defines results in this behavior. */ | |
| 245 #define AGGREGATE_PADDING_FIXED 1 | |
| 246 #define AGGREGATES_PAD_UPWARD_ALWAYS 1 | |
| 247 | |
| 248 /* Specify padding for the last element of a block move between | |
| 249 registers and memory. FIRST is nonzero if this is the only | |
| 250 element. */ | |
| 251 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ | |
| 111 | 252 (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE)) |
| 0 | 253 |
| 254 /* Indicate that jump tables go in the text section. */ | |
| 255 | |
| 256 #define JUMP_TABLES_IN_TEXT_SECTION 1 | |
| 257 | |
| 258 /* Define any extra SPECS that the compiler needs to generate. */ | |
| 259 #undef SUBTARGET_EXTRA_SPECS | |
| 260 #define SUBTARGET_EXTRA_SPECS \ | |
| 261 { "link_syscalls", LINK_SYSCALLS_SPEC }, \ | |
| 262 { "link_libg", LINK_LIBG_SPEC } | |
| 263 | |
| 264 #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL) | |
| 265 | |
| 266 /* No version of AIX fully supports AltiVec or 64-bit instructions in | |
| 267 32-bit mode. */ | |
| 268 #define OS_MISSING_POWERPC64 1 | |
| 269 #define OS_MISSING_ALTIVEC 1 | |
| 270 | |
| 271 /* WINT_TYPE */ | |
| 272 #define WINT_TYPE "int" | |
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273 |
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274 /* Static stack checking is supported by means of probes. */ |
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275 #define STACK_CHECK_STATIC_BUILTIN 1 |
| 111 | 276 |
| 277 /* Use standard DWARF numbering for DWARF debugging information. */ | |
| 278 #define RS6000_USE_DWARF_NUMBERING | |
| 279 |