Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/m68k/linux.h @ 145:1830386684a0
gcc-9.2.0
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 11:34:05 +0900 |
| parents | 84e7813d76e9 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Definitions for Motorola 68k running Linux-based GNU systems with |
| 2 ELF format. | |
| 145 | 3 Copyright (C) 1995-2020 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 | |
| 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) | |
| 10 any later version. | |
| 11 | |
| 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. | |
| 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 | |
|
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21 /* Add %(asm_cpu_spec) to a generic definition of ASM_SPEC. */ |
| 0 | 22 #undef ASM_SPEC |
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23 #define ASM_SPEC "%(asm_cpu_spec) %(asm_pcrel_spec)" |
| 0 | 24 |
| 25 #undef PREFERRED_STACK_BOUNDARY | |
| 26 #define PREFERRED_STACK_BOUNDARY 32 | |
| 27 | |
| 28 /* for 68k machines this only needs to be TRUE for the 68000 */ | |
| 29 | |
| 30 #undef STRICT_ALIGNMENT | |
| 31 #define STRICT_ALIGNMENT 0 | |
| 32 #undef M68K_HONOR_TARGET_STRICT_ALIGNMENT | |
| 33 #define M68K_HONOR_TARGET_STRICT_ALIGNMENT 0 | |
| 34 | |
| 35 /* Here are four prefixes that are used by asm_fprintf to | |
| 36 facilitate customization for alternate assembler syntaxes. | |
| 37 Machines with no likelihood of an alternate syntax need not | |
| 38 define these and need not use asm_fprintf. */ | |
| 39 | |
| 40 /* The prefix for register names. Note that REGISTER_NAMES | |
| 41 is supposed to include this prefix. Also note that this is NOT an | |
| 42 fprintf format string, it is a literal string */ | |
| 43 | |
| 44 #undef REGISTER_PREFIX | |
| 45 #define REGISTER_PREFIX "%" | |
| 46 | |
| 47 /* The prefix for local (compiler generated) labels. | |
| 48 These labels will not appear in the symbol table. */ | |
| 49 | |
| 50 #undef LOCAL_LABEL_PREFIX | |
| 51 #define LOCAL_LABEL_PREFIX "." | |
| 52 | |
| 53 /* The prefix to add to user-visible assembler symbols. */ | |
| 54 | |
| 55 #undef USER_LABEL_PREFIX | |
| 56 #define USER_LABEL_PREFIX "" | |
| 57 | |
| 58 #define ASM_COMMENT_START "|" | |
| 59 | |
| 60 /* Target OS builtins. */ | |
| 111 | 61 #define TARGET_OS_CPP_BUILTINS() GNU_USER_TARGET_OS_CPP_BUILTINS() |
| 0 | 62 |
| 63 #undef CPP_SPEC | |
| 64 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" | |
| 65 | |
| 66 /* Provide a LINK_SPEC appropriate for GNU/Linux. Here we provide support | |
| 67 for the special GCC options -static and -shared, which allow us to | |
| 68 link things in one of these three modes by applying the appropriate | |
|
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69 combinations of options at link-time. |
| 0 | 70 |
| 71 When the -shared link option is used a final link is not being | |
| 72 done. */ | |
| 73 | |
| 74 #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1" | |
| 75 | |
| 145 | 76 #undef MUSL_DYNAMIC_LINKER |
| 77 #define MUSL_DYNAMIC_LINKER "/lib/ld-musl-m68k.so.1" | |
| 78 | |
| 0 | 79 #undef LINK_SPEC |
| 80 #define LINK_SPEC "-m m68kelf %{shared} \ | |
| 81 %{!shared: \ | |
| 82 %{!static: \ | |
| 83 %{rdynamic:-export-dynamic} \ | |
| 111 | 84 -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \ |
| 0 | 85 %{static}}" |
| 86 | |
| 87 /* For compatibility with linux/a.out */ | |
| 88 | |
| 89 #undef PCC_BITFIELD_TYPE_MATTERS | |
| 90 | |
| 91 /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to | |
| 92 keep switch tables in the text section. */ | |
| 93 | |
| 94 #define JUMP_TABLES_IN_TEXT_SECTION 1 | |
| 95 | |
| 96 /* Use the default action for outputting the case label. */ | |
| 97 #undef ASM_OUTPUT_CASE_LABEL | |
| 98 #define ASM_RETURN_CASE_JUMP \ | |
| 99 do { \ | |
| 100 if (TARGET_COLDFIRE) \ | |
| 101 { \ | |
| 102 if (ADDRESS_REG_P (operands[0])) \ | |
| 103 return "jmp %%pc@(2,%0:l)"; \ | |
| 111 | 104 else if (TARGET_LONG_JUMP_TABLE_OFFSETS) \ |
| 105 return "jmp %%pc@(2,%0:l)"; \ | |
| 0 | 106 else \ |
| 107 return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \ | |
| 108 } \ | |
| 111 | 109 else if (TARGET_LONG_JUMP_TABLE_OFFSETS) \ |
| 110 return "jmp %%pc@(2,%0:l)"; \ | |
| 0 | 111 else \ |
| 112 return "jmp %%pc@(2,%0:w)"; \ | |
| 113 } while (0) | |
| 114 | |
| 115 /* This is how to output an assembler line that says to advance the | |
| 116 location counter to a multiple of 2**LOG bytes. */ | |
| 117 | |
| 118 #undef ASM_OUTPUT_ALIGN | |
| 119 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
| 120 if ((LOG) > 0) \ | |
| 121 fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); | |
| 122 | |
| 123 /* If defined, a C expression whose value is a string containing the | |
| 124 assembler operation to identify the following data as uninitialized global | |
| 125 data. */ | |
| 126 | |
| 127 #define BSS_SECTION_ASM_OP "\t.section\t.bss" | |
| 128 | |
| 129 /* A C statement (sans semicolon) to output to the stdio stream | |
| 130 FILE the assembler definition of uninitialized global DECL named | |
| 131 NAME whose size is SIZE bytes and alignment is ALIGN bytes. | |
| 132 Try to use asm_output_aligned_bss to implement this macro. */ | |
| 133 | |
| 134 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ | |
| 135 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) | |
| 136 | |
| 137 /* Output assembler code to FILE to increment profiler label # LABELNO | |
| 138 for profiling a function entry. */ | |
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139 #define NO_PROFILE_COUNTERS 1 |
| 0 | 140 #undef FUNCTION_PROFILER |
| 141 #define FUNCTION_PROFILER(FILE, LABELNO) \ | |
| 142 { \ | |
| 143 if (flag_pic) \ | |
| 144 fprintf (FILE, "\tbsr.l _mcount@PLTPC\n"); \ | |
| 145 else \ | |
| 146 fprintf (FILE, "\tjbsr _mcount\n"); \ | |
| 147 } | |
| 148 | |
| 149 /* Do not break .stabs pseudos into continuations. */ | |
| 150 | |
| 151 #define DBX_CONTIN_LENGTH 0 | |
| 152 | |
| 153 /* 1 if N is a possible register number for a function value. For | |
| 154 m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral, | |
| 155 pointer, or floating types, respectively. Reject fp0 if not using | |
| 156 a 68881 coprocessor. */ | |
| 157 | |
| 158 #undef FUNCTION_VALUE_REGNO_P | |
| 159 #define FUNCTION_VALUE_REGNO_P(N) \ | |
| 160 ((N) == D0_REG || (N) == A0_REG || (TARGET_68881 && (N) == FP0_REG)) | |
| 161 | |
| 162 /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for | |
| 163 more than one register. */ | |
| 164 | |
| 165 #undef NEEDS_UNTYPED_CALL | |
| 166 #define NEEDS_UNTYPED_CALL 1 | |
| 167 | |
| 168 /* Define how to generate (in the callee) the output value of a | |
| 169 function and how to find (in the caller) the value returned by a | |
| 170 function. VALTYPE is the data type of the value (as a tree). If | |
| 171 the precise function being called is known, FUNC is its | |
| 172 FUNCTION_DECL; otherwise, FUNC is 0. For m68k/SVR4 generate the | |
| 173 result in d0, a0, or fp0 as appropriate. */ | |
| 174 | |
| 175 #undef FUNCTION_VALUE | |
| 176 #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
| 177 m68k_function_value (VALTYPE, FUNC) | |
| 178 | |
| 179 /* Define how to find the value returned by a library function | |
| 180 assuming the value has mode MODE. | |
| 181 For m68k/SVR4 look for integer values in d0, pointer values in d0 | |
| 182 (returned in both d0 and a0), and floating values in fp0. */ | |
| 183 | |
| 184 #undef LIBCALL_VALUE | |
| 185 #define LIBCALL_VALUE(MODE) \ | |
| 186 m68k_libcall_value (MODE) | |
| 187 | |
| 188 /* For m68k SVR4, structures are returned using the reentrant | |
| 189 technique. */ | |
| 190 #undef PCC_STATIC_STRUCT_RETURN | |
| 191 #define DEFAULT_PCC_STRUCT_RETURN 0 | |
| 192 | |
| 193 /* Finalize the trampoline by flushing the insn cache. */ | |
| 194 | |
| 195 #undef FINALIZE_TRAMPOLINE | |
| 196 #define FINALIZE_TRAMPOLINE(TRAMP) \ | |
| 197 emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"), \ | |
| 111 | 198 LCT_NORMAL, VOIDmode, TRAMP, Pmode, \ |
| 199 plus_constant (Pmode, TRAMP, TRAMPOLINE_SIZE), \ | |
| 200 Pmode); | |
| 0 | 201 |
| 202 /* Clear the instruction cache from `beg' to `end'. This makes an | |
| 203 inline system call to SYS_cacheflush. The arguments are as | |
| 204 follows: | |
| 205 | |
| 206 cacheflush (addr, scope, cache, len) | |
| 207 | |
| 208 addr - the start address for the flush | |
| 209 scope - the scope of the flush (see the cpush insn) | |
| 210 cache - which cache to flush (see the cpush insn) | |
| 211 len - a factor relating to the number of flushes to perform: | |
| 212 len/16 lines, or len/4096 pages. */ | |
| 213 | |
| 214 #define CLEAR_INSN_CACHE(BEG, END) \ | |
| 215 { \ | |
| 216 register unsigned long _beg __asm ("%d1") = (unsigned long) (BEG); \ | |
| 217 unsigned long _end = (unsigned long) (END); \ | |
| 218 register unsigned long _len __asm ("%d4") = (_end - _beg + 32); \ | |
| 219 __asm __volatile \ | |
| 220 ("move%.l #123, %/d0\n\t" /* system call nr */ \ | |
| 221 "move%.l #1, %/d2\n\t" /* clear lines */ \ | |
| 222 "move%.l #3, %/d3\n\t" /* insn+data caches */ \ | |
| 223 "trap #0" \ | |
| 224 : /* no outputs */ \ | |
| 225 : "d" (_beg), "d" (_len) \ | |
| 226 : "%d0", "%d2", "%d3"); \ | |
| 227 } | |
| 228 | |
| 229 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack | |
| 230 | |
|
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231 #undef DBX_REGISTER_NUMBER |
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232 #define DBX_REGISTER_NUMBER(REGNO) (REGNO) |
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233 |
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234 #undef SIZE_TYPE |
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235 #define SIZE_TYPE "unsigned int" |
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236 |
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237 #undef PTRDIFF_TYPE |
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238 #define PTRDIFF_TYPE "int" |
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239 |
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240 #undef WCHAR_TYPE |
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241 #define WCHAR_TYPE "long int" |
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242 |
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243 #undef WCHAR_TYPE_SIZE |
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244 #define WCHAR_TYPE_SIZE BITS_PER_WORD |
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245 |
| 111 | 246 /* Install the __sync libcalls. */ |
| 247 #undef TARGET_INIT_LIBFUNCS | |
| 248 #define TARGET_INIT_LIBFUNCS m68k_init_sync_libfuncs |