/* Common VxWorks target definitions for GNU compiler.
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/* Common VxWorks target definitions for GNU compiler.
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Copyright (C) 2007, 2008
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Copyright (C) 2007, 2008
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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Contributed by CodeSourcery, Inc.
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Contributed by CodeSourcery, Inc.
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This file is part of GCC.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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Software Foundation; either version 3, or (at your option) any later
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version.
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "config.h"
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#include "system.h"
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#include "system.h"
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#include "coretypes.h"
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#include "coretypes.h"
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#include "target.h"
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#include "target.h"
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#include "toplev.h"
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#include "toplev.h"
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#include "output.h"
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#include "output.h"
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#include "tm.h"
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#include "tm.h"
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#include "tree.h"
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#include "tree.h"
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/* Like default_named_section_asm_out_constructor, except that even
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/* Like default_named_section_asm_out_constructor, except that even
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constructors with DEFAULT_INIT_PRIORITY must go in a numbered
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constructors with DEFAULT_INIT_PRIORITY must go in a numbered
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section on VxWorks. The VxWorks runtime uses a clever trick to get
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section on VxWorks. The VxWorks runtime uses a clever trick to get
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the sentinel entry (-1) inserted at the beginning of the .ctors
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the sentinel entry (-1) inserted at the beginning of the .ctors
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segment. This trick will not work if we ever generate any entries
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segment. This trick will not work if we ever generate any entries
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in plain .ctors sections; we must always use .ctors.PRIORITY. */
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in plain .ctors sections; we must always use .ctors.PRIORITY. */
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void
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void
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vxworks_asm_out_constructor (rtx symbol, int priority)
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vxworks_asm_out_constructor (rtx symbol, int priority)
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{
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{
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section *sec;
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section *sec;
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sec = get_cdtor_priority_section (priority,
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sec = get_cdtor_priority_section (priority,
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/*constructor_p=*/true);
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/*constructor_p=*/true);
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assemble_addr_to_section (symbol, sec);
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assemble_addr_to_section (symbol, sec);
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}
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}
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/* See comment for vxworks_asm_out_constructor. */
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/* See comment for vxworks_asm_out_constructor. */
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void
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void
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vxworks_asm_out_destructor (rtx symbol, int priority)
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vxworks_asm_out_destructor (rtx symbol, int priority)
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{
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{
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section *sec;
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section *sec;
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sec = get_cdtor_priority_section (priority,
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sec = get_cdtor_priority_section (priority,
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/*constructor_p=*/false);
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/*constructor_p=*/false);
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assemble_addr_to_section (symbol, sec);
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assemble_addr_to_section (symbol, sec);
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}
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}
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/* Return the list of FIELD_DECLs that make up an emulated TLS
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/* Return the list of FIELD_DECLs that make up an emulated TLS
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variable's control object. TYPE is the structure these are fields
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variable's control object. TYPE is the structure these are fields
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of and *NAME will be filled in with the structure tag that should
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of and *NAME will be filled in with the structure tag that should
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be used. */
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be used. */
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static tree
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static tree
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vxworks_emutls_var_fields (tree type, tree *name)
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vxworks_emutls_var_fields (tree type, tree *name)
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{
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{
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tree field, next_field;
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tree field, next_field;
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*name = get_identifier ("__tls_var");
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*name = get_identifier ("__tls_var");
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field = build_decl (FIELD_DECL, get_identifier ("size"),
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field = build_decl (FIELD_DECL, get_identifier ("size"),
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unsigned_type_node);
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unsigned_type_node);
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DECL_CONTEXT (field) = type;
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DECL_CONTEXT (field) = type;
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next_field = field;
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next_field = field;
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field = build_decl (FIELD_DECL, get_identifier ("module_id"),
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field = build_decl (FIELD_DECL, get_identifier ("module_id"),
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unsigned_type_node);
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unsigned_type_node);
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DECL_CONTEXT (field) = type;
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DECL_CONTEXT (field) = type;
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TREE_CHAIN (field) = next_field;
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TREE_CHAIN (field) = next_field;
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next_field = field;
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next_field = field;
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field = build_decl (FIELD_DECL, get_identifier ("offset"),
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field = build_decl (FIELD_DECL, get_identifier ("offset"),
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unsigned_type_node);
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unsigned_type_node);
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DECL_CONTEXT (field) = type;
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DECL_CONTEXT (field) = type;
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TREE_CHAIN (field) = next_field;
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TREE_CHAIN (field) = next_field;
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return field;
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return field;
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}
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}
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/* Return the CONSTRUCTOR to initialize an emulated TLS control
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/* Return the CONSTRUCTOR to initialize an emulated TLS control
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object. VAR is the control object. DECL is the TLS object itself
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object. VAR is the control object. DECL is the TLS object itself
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and TMPL_ADDR is the address (an ADDR_EXPR) of the initializer for
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and TMPL_ADDR is the address (an ADDR_EXPR) of the initializer for
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that object. */
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that object. */
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static tree
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static tree
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vxworks_emutls_var_init (tree var, tree decl, tree tmpl_addr)
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vxworks_emutls_var_init (tree var, tree decl, tree tmpl_addr)
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{
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{
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VEC(constructor_elt,gc) *v = VEC_alloc (constructor_elt, gc, 3);
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VEC(constructor_elt,gc) *v = VEC_alloc (constructor_elt, gc, 3);
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constructor_elt *elt;
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constructor_elt *elt;
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tree type = TREE_TYPE (var);
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tree type = TREE_TYPE (var);
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tree field = TYPE_FIELDS (type);
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tree field = TYPE_FIELDS (type);
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elt = VEC_quick_push (constructor_elt, v, NULL);
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elt = VEC_quick_push (constructor_elt, v, NULL);
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elt->index = field;
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elt->index = field;
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elt->value = fold_convert (TREE_TYPE (field), tmpl_addr);
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elt->value = fold_convert (TREE_TYPE (field), tmpl_addr);
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elt = VEC_quick_push (constructor_elt, v, NULL);
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elt = VEC_quick_push (constructor_elt, v, NULL);
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field = TREE_CHAIN (field);
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field = TREE_CHAIN (field);
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elt->index = field;
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elt->index = field;
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elt->value = build_int_cst (TREE_TYPE (field), 0);
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elt->value = build_int_cst (TREE_TYPE (field), 0);
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elt = VEC_quick_push (constructor_elt, v, NULL);
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elt = VEC_quick_push (constructor_elt, v, NULL);
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field = TREE_CHAIN (field);
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field = TREE_CHAIN (field);
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elt->index = field;
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elt->index = field;
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elt->value = fold_convert (TREE_TYPE (field), DECL_SIZE_UNIT (decl));
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elt->value = fold_convert (TREE_TYPE (field), DECL_SIZE_UNIT (decl));
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return build_constructor (type, v);
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return build_constructor (type, v);
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}
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}
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/* Do VxWorks-specific parts of OVERRIDE_OPTIONS. */
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/* Do VxWorks-specific parts of OVERRIDE_OPTIONS. */
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void
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void
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vxworks_override_options (void)
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vxworks_override_options (void)
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{
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{
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/* We don't support __thread via target hooks. */
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/* We don't support __thread via target hooks. */
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targetm.have_tls = false;
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targetm.have_tls = false;
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targetm.emutls.get_address = "__builtin___tls_lookup";
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targetm.emutls.get_address = "__builtin___tls_lookup";
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targetm.emutls.register_common = NULL;
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targetm.emutls.register_common = NULL;
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targetm.emutls.var_section = ".tls_vars";
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targetm.emutls.var_section = ".tls_vars";
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targetm.emutls.tmpl_section = ".tls_data";
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targetm.emutls.tmpl_section = ".tls_data";
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targetm.emutls.var_prefix = "__tls__";
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targetm.emutls.var_prefix = "__tls__";
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targetm.emutls.tmpl_prefix = "";
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targetm.emutls.tmpl_prefix = "";
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targetm.emutls.var_fields = vxworks_emutls_var_fields;
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targetm.emutls.var_fields = vxworks_emutls_var_fields;
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targetm.emutls.var_init = vxworks_emutls_var_init;
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targetm.emutls.var_init = vxworks_emutls_var_init;
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targetm.emutls.var_align_fixed = true;
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targetm.emutls.var_align_fixed = true;
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targetm.emutls.debug_form_tls_address = true;
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targetm.emutls.debug_form_tls_address = true;
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/* We can use .ctors/.dtors sections only in RTP mode. */
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/* We can use .ctors/.dtors sections only in RTP mode. */
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targetm.have_ctors_dtors = TARGET_VXWORKS_RTP;
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targetm.have_ctors_dtors = TARGET_VXWORKS_RTP;
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/* PIC is only supported for RTPs. */
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/* PIC is only supported for RTPs. */
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if (flag_pic && !TARGET_VXWORKS_RTP)
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if (flag_pic && !TARGET_VXWORKS_RTP)
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error ("PIC is only supported for RTPs");
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error ("PIC is only supported for RTPs");
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}
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}
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