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annotate gcc/config/alpha/vms.h @ 158:494b0b89df80 default tip
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| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 25 May 2020 18:13:55 +0900 |
| parents | 1830386684a0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Output variables, constants and external declarations, for GNU compiler. |
| 145 | 2 Copyright (C) 1996-2020 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of GCC. | |
| 5 | |
| 6 GCC is free software; you can redistribute it and/or modify | |
| 7 it under the terms of the GNU General Public License as published by | |
| 8 the Free Software Foundation; either version 3, or (at your option) | |
| 9 any later version. | |
| 10 | |
| 11 GCC is distributed in the hope that it will be useful, | |
| 12 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 GNU General Public License for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with GCC; see the file COPYING3. If not see | |
| 18 <http://www.gnu.org/licenses/>. */ | |
| 19 | |
|
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20 /* Alpha/VMS object format is not really Elf, but this makes compiling |
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21 crtstuff.c and dealing with shared library initialization much easier. */ |
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22 #define OBJECT_FORMAT_ELF |
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23 |
| 111 | 24 /* Do not use TM clone registry as it currently doesn't work. Alpha/VMS |
| 25 object is too far from ELF for supporting TM out of the box. */ | |
| 26 #define USE_TM_CLONE_REGISTRY 0 | |
| 27 | |
| 0 | 28 /* This enables certain macros in alpha.h, which will make an indirect |
| 29 reference to an external symbol an invalid address. This needs to be | |
| 30 defined before we include alpha.h, since it determines which macros | |
| 31 are used for GO_IF_*. */ | |
| 32 | |
| 33 #define NO_EXTERNAL_INDIRECT_ADDRESS | |
| 34 | |
| 111 | 35 #define SUBTARGET_OS_CPP_BUILTINS() \ |
| 0 | 36 do { \ |
| 111 | 37 builtin_define ("__ALPHA"); \ |
| 38 if (TARGET_FLOAT_VAX) \ | |
| 39 builtin_define ("__G_FLOAT"); \ | |
| 40 else \ | |
| 41 builtin_define ("__IEEE_FLOAT"); \ | |
| 0 | 42 } while (0) |
| 43 | |
| 44 #undef PCC_STATIC_STRUCT_RETURN | |
| 45 | |
| 46 #define MAX_OFILE_ALIGNMENT 524288 /* 8 x 2^16 by DEC Ada Test CD40VRA */ | |
| 47 | |
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48 /* The maximum alignment 'malloc' honors. */ |
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49 #undef MALLOC_ABI_ALIGNMENT |
| 111 | 50 #define MALLOC_ABI_ALIGNMENT \ |
| 51 ((flag_vms_malloc64 && flag_vms_pointer_size != VMS_POINTER_SIZE_NONE \ | |
| 52 ? 16 : 8) * BITS_PER_UNIT) | |
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53 |
| 0 | 54 #undef FIXED_REGISTERS |
| 55 #define FIXED_REGISTERS \ | |
| 56 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
| 57 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \ | |
| 58 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
| 59 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 } | |
| 60 | |
| 61 #undef CALL_USED_REGISTERS | |
| 62 #define CALL_USED_REGISTERS \ | |
| 63 {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
| 64 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
| 65 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \ | |
| 66 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 } | |
| 67 | |
| 68 /* List the order in which to allocate registers. Each register must be | |
| 69 listed once, even those in FIXED_REGISTERS. | |
| 70 | |
| 71 We allocate in the following order: | |
| 72 $f1 (nonsaved floating-point register) | |
| 73 $f10-$f15 (likewise) | |
| 74 $f22-$f30 (likewise) | |
| 75 $f21-$f16 (likewise, but input args) | |
| 76 $f0 (nonsaved, but return value) | |
| 77 $f2-$f9 (saved floating-point registers) | |
| 78 $1 (nonsaved integer registers) | |
| 79 $22-$25 (likewise) | |
| 80 $28 (likewise) | |
| 81 $0 (likewise, but return value) | |
| 82 $21-$16 (likewise, but input args) | |
| 83 $27 (procedure value in OSF, nonsaved in NT) | |
| 84 $2-$8 (saved integer registers) | |
| 85 $9-$14 (saved integer registers) | |
| 86 $26 (return PC) | |
| 87 $15 (frame pointer) | |
| 88 $29 (global pointer) | |
| 89 $30, $31, $f31 (stack pointer and always zero/ap & fp) */ | |
| 90 | |
| 91 #undef REG_ALLOC_ORDER | |
| 92 #define REG_ALLOC_ORDER \ | |
| 93 {33, \ | |
| 94 42, 43, 44, 45, 46, 47, \ | |
| 95 54, 55, 56, 57, 58, 59, 60, 61, 62, \ | |
| 96 53, 52, 51, 50, 49, 48, \ | |
| 97 32, \ | |
| 98 34, 35, 36, 37, 38, 39, 40, 41, \ | |
| 99 1, \ | |
| 100 22, 23, 24, 25, \ | |
| 101 28, \ | |
| 102 0, \ | |
| 103 21, 20, 19, 18, 17, 16, \ | |
| 104 27, \ | |
| 105 2, 3, 4, 5, 6, 7, 8, \ | |
| 106 9, 10, 11, 12, 13, 14, \ | |
| 107 26, \ | |
| 108 15, \ | |
| 109 29, \ | |
| 110 30, 31, 63 } | |
| 111 | |
| 112 #undef HARD_FRAME_POINTER_REGNUM | |
| 113 #define HARD_FRAME_POINTER_REGNUM 29 | |
| 114 | |
| 115 /* Define registers used by the epilogue and return instruction. */ | |
| 116 #undef EPILOGUE_USES | |
| 117 #define EPILOGUE_USES(REGNO) ((REGNO) == 26 || (REGNO) == 29) | |
| 118 | |
| 119 #undef INITIAL_ELIMINATION_OFFSET | |
| 120 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
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121 ((OFFSET) = alpha_vms_initial_elimination_offset(FROM, TO)) |
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122 |
| 0 | 123 |
| 124 /* Define a data type for recording info about an argument list | |
| 125 during the scan of that argument list. This data type should | |
| 126 hold all necessary information about the function itself | |
| 127 and about the args processed so far, enough to enable macros | |
| 128 such as FUNCTION_ARG to determine where the next arg should go. | |
| 129 | |
| 130 On Alpha/VMS, this is a structure that contains the number of | |
| 131 arguments and, for each argument, the datatype of that argument. | |
| 132 | |
| 133 The number of arguments is a number of words of arguments scanned so far. | |
| 134 Thus 6 or more means all following args should go on the stack. */ | |
| 135 | |
| 136 enum avms_arg_type {I64, FF, FD, FG, FS, FT}; | |
| 137 typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info; | |
| 138 | |
| 139 #undef CUMULATIVE_ARGS | |
| 140 #define CUMULATIVE_ARGS avms_arg_info | |
| 141 | |
| 142 /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
| 143 for a call to a function whose data type is FNTYPE. | |
| 144 For a library call, FNTYPE is 0. */ | |
| 145 | |
| 146 #undef INIT_CUMULATIVE_ARGS | |
| 147 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ | |
| 148 (CUM).num_args = 0; \ | |
| 149 (CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64; \ | |
| 150 (CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64; | |
| 151 | |
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152 #define DEFAULT_PCC_STRUCT_RETURN 0 |
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153 |
| 111 | 154 /* Even though pointers are 64bits, only 32bit ever remain significant in code |
| 155 addresses. */ | |
| 156 #define MASK_RETURN_ADDR \ | |
| 157 (flag_vms_pointer_size == VMS_POINTER_SIZE_NONE \ | |
| 158 ? constm1_rtx \ | |
| 159 : GEN_INT (0xffffffff)) | |
| 160 | |
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161 #undef ASM_WEAKEN_LABEL |
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162 #define ASM_WEAKEN_LABEL(FILE, NAME) \ |
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163 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ |
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164 fputc ('\n', FILE); } while (0) |
| 0 | 165 |
| 166 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" | |
| 167 #define CTORS_SECTION_ASM_OP "\t.ctors" | |
| 168 #define DTORS_SECTION_ASM_OP "\t.dtors" | |
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169 #define SDATA_SECTION_ASM_OP "\t.sdata" |
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170 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ |
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171 asm (SECTION_OP "\n\t.long " #FUNC"\n"); |
| 0 | 172 |
| 173 #undef ASM_OUTPUT_ADDR_DIFF_ELT | |
| 174 | |
| 175 #undef ASM_OUTPUT_ADDR_VEC_ELT | |
| 176 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ | |
| 177 fprintf (FILE, "\t.quad $L%d\n", (VALUE)) | |
| 178 | |
| 179 #undef CASE_VECTOR_MODE | |
| 180 #define CASE_VECTOR_MODE DImode | |
| 181 #undef CASE_VECTOR_PC_RELATIVE | |
| 182 | |
| 183 #undef ASM_OUTPUT_CASE_LABEL | |
| 184 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \ | |
| 185 { ASM_OUTPUT_ALIGN (FILE, 3); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); } | |
| 186 | |
| 187 /* This says how to output assembler code to declare an | |
| 188 uninitialized external linkage data object. */ | |
| 189 | |
| 190 #define COMMON_ASM_OP "\t.comm\t" | |
| 191 | |
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192 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON |
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193 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \ |
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194 vms_output_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN) |
| 0 | 195 |
| 196 /* Control how constructors and destructors are emitted. */ | |
| 197 #define TARGET_ASM_CONSTRUCTOR vms_asm_out_constructor | |
| 198 #define TARGET_ASM_DESTRUCTOR vms_asm_out_destructor | |
| 199 | |
| 200 #define DWARF2_DEBUGGING_INFO 1 | |
| 201 #define VMS_DEBUGGING_INFO 1 | |
| 202 | |
| 203 #define DWARF2_UNWIND_INFO 1 | |
| 204 | |
| 205 #undef EH_RETURN_HANDLER_RTX | |
| 206 #define EH_RETURN_HANDLER_RTX \ | |
| 111 | 207 gen_rtx_MEM (Pmode, plus_constant (Pmode, stack_pointer_rtx, 8)) |
| 0 | 208 |
| 209 #define LINK_EH_SPEC "vms-dwarf2eh.o%s " | |
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210 #define LINK_GCC_C_SEQUENCE_SPEC "%G" |
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211 |
| 0 | 212 /* This is how to output an assembler line |
| 213 that says to advance the location counter | |
| 214 to a multiple of 2**LOG bytes. */ | |
| 215 | |
| 216 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
| 217 fprintf (FILE, "\t.align %d\n", LOG); | |
| 218 | |
| 111 | 219 /* This is how to advance the location counter by SIZE bytes. */ |
| 220 | |
| 221 #define ASM_OUTPUT_SKIP(FILE,SIZE) \ | |
| 222 fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE)) | |
| 223 | |
| 224 /* This says how to output an assembler line | |
| 225 to define a global common symbol. */ | |
| 226 | |
| 227 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \ | |
| 228 ( fputs ("\t.lcomm ", (FILE)), \ | |
| 229 assemble_name ((FILE), (NAME)), \ | |
| 230 fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))) | |
| 231 | |
| 0 | 232 /* Switch into a generic section. */ |
| 233 #define TARGET_ASM_NAMED_SECTION vms_asm_named_section | |
| 234 | |
| 111 | 235 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ |
| 236 do \ | |
| 237 { \ | |
| 238 fprintf ((FILE), "\t"); \ | |
| 239 assemble_name (FILE, LABEL1); \ | |
| 240 fprintf (FILE, " = "); \ | |
| 241 assemble_name (FILE, LABEL2); \ | |
| 242 fprintf (FILE, "\n"); \ | |
| 243 } \ | |
| 244 while (0) | |
| 0 | 245 |
| 246 #undef PREFERRED_DEBUGGING_TYPE | |
| 247 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG | |
| 248 | |
| 249 #define ASM_PN_FORMAT "%s___%lu" | |
| 250 | |
| 251 /* ??? VMS uses different linkage. */ | |
| 252 #undef TARGET_ASM_OUTPUT_MI_THUNK | |
| 253 | |
| 254 #undef ASM_SPEC | |
| 255 #undef ASM_FINAL_SPEC | |
| 256 | |
| 257 /* The VMS convention is to always provide minimal debug info | |
| 111 | 258 for a traceback unless specifically overridden. |
| 259 | |
| 260 Because ASM_OUTPUT_ADDR_DIFF_ELT is not defined for alpha-vms, | |
| 261 jump tables cannot be output for PIC code, because you can't put | |
| 262 an absolute address in a readonly section. Putting the table in | |
| 263 a writable section is a security hole. Therefore, we unset the | |
| 264 flag_jump_tables flag, forcing switch statements to be expanded | |
| 265 using decision trees. There are probably other ways to address | |
| 266 this issue, but using a decision tree is clearly safe. */ | |
| 0 | 267 |
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268 #undef SUBTARGET_OVERRIDE_OPTIONS |
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269 #define SUBTARGET_OVERRIDE_OPTIONS \ |
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270 do { \ |
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271 if (write_symbols == NO_DEBUG \ |
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272 && debug_info_level == DINFO_LEVEL_NONE) \ |
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273 { \ |
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274 write_symbols = VMS_DEBUG; \ |
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275 debug_info_level = DINFO_LEVEL_TERSE; \ |
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276 } \ |
| 111 | 277 if (flag_pic) \ |
| 278 flag_jump_tables = 0; \ | |
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279 } while (0) |
| 0 | 280 |
| 111 | 281 #undef LINK_SPEC |
| 282 #if HAVE_GNU_LD | |
| 283 /* GNU-ld built-in linker script already handles the dwarf2 debug sections. */ | |
| 284 #define LINK_SPEC "%{shared} %{v}" | |
| 285 #else | |
| 0 | 286 /* Link with vms-dwarf2.o if -g (except -g0). This causes the |
| 287 VMS link to pull all the dwarf2 debug sections together. */ | |
| 111 | 288 #define LINK_SPEC "%{g0} %{g*:-g vms-dwarf2.o%s} %{shared} %{v} %{map}" |
| 289 #endif | |
| 0 | 290 |
| 291 #undef STARTFILE_SPEC | |
| 111 | 292 #define STARTFILE_SPEC "%{!shared:crt0.o%s crtbegin.o%s} \ |
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293 %{!static:%{shared:crtbeginS.o%s}}" |
| 0 | 294 |
| 111 | 295 #define ENDFILE_SPEC "%{!shared:crtend.o%s} %{!static:%{shared:crtendS.o%s}}" |
| 0 | 296 |
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297 #define INIT_SECTION_ASM_OP "\t.section LIB$INITIALIZE,GBL,NOWRT" |
| 0 | 298 |
| 299 #define LONGLONG_STANDALONE 1 | |
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300 |
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301 #undef TARGET_VALID_POINTER_MODE |
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302 #define TARGET_VALID_POINTER_MODE vms_valid_pointer_mode |
| 111 | 303 |
| 304 /* Default values for _CRTL_VER and _VMS_VER. */ | |
| 305 #define VMS_DEFAULT_CRTL_VER 70320000 | |
| 306 #define VMS_DEFAULT_VMS_VER 70320000 |