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* a-exexpr.adb (Others_Value, All_Others_Value): New variables, the address of which may be used to represent "others" and "all others" choices in exception tables, instead of the current harcoded (void *)0 and (void *)1. (Setup_Exception): Do nothing in the GNAT SJLJ case. * gigi.h (others_decl, all_others_decl): New decls representing the new Others_Value and All_Others_Value objects. (struct attrib): Rename "arg" component as "args", since GCC expects a list of arguments in there. * raise.c (GNAT_OTHERS, GNAT_ALL_OTHERS): Are now the address of the corresponding objects exported by a-exexpr, instead of hardcoded dummy addresses. * trans.c (Exception_Handler_to_gnu_zcx): Use the address of others_decl and all_others_decl instead of hardcoded dummy addresses to represent "others" and "all others" choices, which is cleaner and more flexible with respect to the possible eh pointer encoding policies. * utils.c (init_gigi_decls): Initialize others_decl and all_others_decl. (process_attributes): Account for the naming change of the "args" attribute list entry component. * decl.c (build_attr_list): Rename into prepend_attributes to allow cumulating attributes for different entities into a single list. (gnat_to_gnu_entity): Use prepend_attributes to build the list of attributes for the current entity and propagate first subtype attributes to other subtypes. <E_Procedure>: Attribute arguments are attr->args and not attr->arg any more. (build_attr_list): Ditto. Make attr->args a TREE_LIST when there is an argument provided, as this is what GCC expects. Use NULL_TREE instead of 0 for trees. From-SVN: r90900
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