Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/vxworks.c @ 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 /* Common VxWorks target definitions for GNU compiler. |
| 145 | 2 Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| 0 | 3 Contributed by CodeSourcery, Inc. |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it under | |
| 8 the terms of the GNU General Public License as published by the Free | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 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 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "coretypes.h" | |
| 24 #include "target.h" | |
| 111 | 25 #include "tree.h" |
| 26 #include "stringpool.h" | |
|
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27 #include "diagnostic-core.h" |
| 0 | 28 #include "output.h" |
| 111 | 29 #include "fold-const.h" |
| 0 | 30 |
| 131 | 31 #if !HAVE_INITFINI_ARRAY_SUPPORT |
| 0 | 32 /* Like default_named_section_asm_out_constructor, except that even |
| 33 constructors with DEFAULT_INIT_PRIORITY must go in a numbered | |
| 34 section on VxWorks. The VxWorks runtime uses a clever trick to get | |
| 35 the sentinel entry (-1) inserted at the beginning of the .ctors | |
| 36 segment. This trick will not work if we ever generate any entries | |
| 37 in plain .ctors sections; we must always use .ctors.PRIORITY. */ | |
| 38 | |
| 39 void | |
| 40 vxworks_asm_out_constructor (rtx symbol, int priority) | |
| 41 { | |
| 42 section *sec; | |
| 43 | |
| 44 sec = get_cdtor_priority_section (priority, | |
| 45 /*constructor_p=*/true); | |
| 46 assemble_addr_to_section (symbol, sec); | |
| 47 } | |
| 48 | |
| 49 /* See comment for vxworks_asm_out_constructor. */ | |
| 50 | |
| 51 void | |
| 52 vxworks_asm_out_destructor (rtx symbol, int priority) | |
| 53 { | |
| 54 section *sec; | |
| 55 | |
| 56 sec = get_cdtor_priority_section (priority, | |
| 57 /*constructor_p=*/false); | |
| 58 assemble_addr_to_section (symbol, sec); | |
| 59 } | |
| 131 | 60 #endif |
| 0 | 61 |
| 62 /* Return the list of FIELD_DECLs that make up an emulated TLS | |
| 63 variable's control object. TYPE is the structure these are fields | |
| 64 of and *NAME will be filled in with the structure tag that should | |
| 65 be used. */ | |
| 66 | |
| 67 static tree | |
| 68 vxworks_emutls_var_fields (tree type, tree *name) | |
| 69 { | |
| 70 tree field, next_field; | |
| 71 | |
| 72 *name = get_identifier ("__tls_var"); | |
| 73 | |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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74 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, |
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f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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75 get_identifier ("size"), unsigned_type_node); |
| 0 | 76 DECL_CONTEXT (field) = type; |
| 77 next_field = field; | |
| 78 | |
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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79 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, |
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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changeset
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80 get_identifier ("module_id"), unsigned_type_node); |
| 0 | 81 DECL_CONTEXT (field) = type; |
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parents:
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82 DECL_CHAIN (field) = next_field; |
| 0 | 83 next_field = field; |
| 84 | |
| 111 | 85 /* The offset field is declared as an unsigned int with pointer mode. */ |
|
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parents:
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diff
changeset
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86 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, |
| 111 | 87 get_identifier ("offset"), long_unsigned_type_node); |
| 88 | |
| 0 | 89 DECL_CONTEXT (field) = type; |
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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90 DECL_CHAIN (field) = next_field; |
| 0 | 91 |
| 92 return field; | |
| 93 } | |
| 94 | |
| 95 /* Return the CONSTRUCTOR to initialize an emulated TLS control | |
| 96 object. VAR is the control object. DECL is the TLS object itself | |
| 97 and TMPL_ADDR is the address (an ADDR_EXPR) of the initializer for | |
| 98 that object. */ | |
| 99 | |
| 100 static tree | |
| 101 vxworks_emutls_var_init (tree var, tree decl, tree tmpl_addr) | |
| 102 { | |
| 111 | 103 vec<constructor_elt, va_gc> *v; |
| 104 vec_alloc (v, 3); | |
| 0 | 105 |
| 106 tree type = TREE_TYPE (var); | |
| 107 tree field = TYPE_FIELDS (type); | |
| 108 | |
| 111 | 109 constructor_elt elt = {field, fold_convert (TREE_TYPE (field), tmpl_addr)}; |
| 110 v->quick_push (elt); | |
| 0 | 111 |
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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112 field = DECL_CHAIN (field); |
| 111 | 113 elt.index = field; |
| 114 elt.value = build_int_cst (TREE_TYPE (field), 0); | |
| 115 v->quick_push (elt); | |
| 0 | 116 |
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f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
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117 field = DECL_CHAIN (field); |
| 111 | 118 elt.index = field; |
| 119 elt.value = fold_convert (TREE_TYPE (field), DECL_SIZE_UNIT (decl)); | |
| 120 v->quick_push (elt); | |
| 0 | 121 |
| 122 return build_constructor (type, v); | |
| 123 } | |
| 124 | |
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parents:
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changeset
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125 /* Do VxWorks-specific parts of TARGET_OPTION_OVERRIDE. */ |
| 0 | 126 |
| 127 void | |
| 128 vxworks_override_options (void) | |
| 129 { | |
| 111 | 130 /* Setup the tls emulation bits if the OS misses proper |
| 131 tls support. */ | |
| 132 targetm.have_tls = VXWORKS_HAVE_TLS; | |
| 0 | 133 |
| 111 | 134 if (!VXWORKS_HAVE_TLS) |
| 135 { | |
| 136 targetm.emutls.get_address = "__builtin___tls_lookup"; | |
| 137 targetm.emutls.register_common = NULL; | |
| 138 targetm.emutls.var_section = ".tls_vars"; | |
| 139 targetm.emutls.tmpl_section = ".tls_data"; | |
| 140 targetm.emutls.var_prefix = "__tls__"; | |
| 141 targetm.emutls.tmpl_prefix = ""; | |
| 142 targetm.emutls.var_fields = vxworks_emutls_var_fields; | |
| 143 targetm.emutls.var_init = vxworks_emutls_var_init; | |
| 144 targetm.emutls.var_align_fixed = true; | |
| 145 targetm.emutls.debug_form_tls_address = true; | |
| 146 } | |
| 147 | |
| 145 | 148 /* Arrange to use .ctors/.dtors sections if the target VxWorks configuration |
| 149 and mode supports it, or the init/fini_array sections if we were | |
| 150 configured with --enable-initfini-array explicitly. In the latter case, | |
| 151 the toolchain user is expected to provide whatever linker level glue is | |
| 152 required to get things to operate properly. */ | |
| 153 | |
| 154 targetm.have_ctors_dtors = | |
| 155 TARGET_VXWORKS_HAVE_CTORS_DTORS || HAVE_INITFINI_ARRAY_SUPPORT; | |
| 0 | 156 |
| 157 /* PIC is only supported for RTPs. */ | |
| 158 if (flag_pic && !TARGET_VXWORKS_RTP) | |
| 159 error ("PIC is only supported for RTPs"); | |
| 111 | 160 |
| 131 | 161 /* VxWorks comes with non-gdb debuggers which only support strict |
| 162 dwarf up to certain version. Default dwarf control to friendly | |
| 163 values for these. */ | |
| 164 | |
| 111 | 165 if (!global_options_set.x_dwarf_strict) |
| 166 dwarf_strict = 1; | |
| 167 | |
| 168 if (!global_options_set.x_dwarf_version) | |
| 131 | 169 dwarf_version = VXWORKS_DWARF_VERSION_DEFAULT; |
| 0 | 170 } |