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/*
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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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/*
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VERSION INFORMATION
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===================
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--------------------------------------------------------------------------
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$Header: /u/g/release/CVSROOT/Source/src/installers/680x0/common/special_exps.c,v 1.1.1.1 1998/01/17 15:55:50 release Exp $
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--------------------------------------------------------------------------
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$Log: special_exps.c,v $
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* Revision 1.1.1.1 1998/01/17 15:55:50 release
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* First version to be checked into rolling release.
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*
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Revision 1.2 1997/10/29 10:22:29 ma
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Replaced use_alloca with has_alloca.
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Revision 1.1.1.1 1997/10/13 12:42:58 ma
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First version.
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Revision 1.1 1997/09/24 08:25:43 ma
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First version
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--------------------------------------------------------------------------
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*/
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#include "config.h"
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#include "common_types.h"
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#include "exp.h"
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#include "expmacs.h"
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#include "exptypes.h"
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#include "shapemacs.h"
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#include "tags.h"
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#include "install_fns.h"
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#include "instrs.h"
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#include "special_exps.h"
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#include "utility.h"
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/************************************************************************
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Make an exp representing the contents of an external tag with
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name n of shape s and variable if v.
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************************************************************************/
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exp make_extn
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PROTO_N ( ( n, s, v ) )
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PROTO_T ( char* n X shape s X int v )
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{
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dec * g = alloc_nof ( dec, 1 ) ;
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exp id = getexp (s, 0, 1, 0, 0, 0, 0, ident_tag);
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exp nme = getexp (s, 0, 1, id, 0, 0, 0, name_tag);
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setglob (id);
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if (v) {
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setvar(id);
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}
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brog(id) = g;
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g -> dec_u.dec_val.dec_exp = id;
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g -> dec_u.dec_val.dec_id = n;
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g -> dec_u.dec_val.extnamed = 1;
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return (nme);
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}
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/************************************************************************
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Make an exp representing a dummy double destination used to force a
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floating point overflow (if any) for expression with zero destination.
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************************************************************************/
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exp get_dummy_double_dest
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PROTO_Z ()
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{
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return (make_extn("___m68k_dummy_double", doublesh, 1));
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}
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/************************************************************************
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Make an exp representing the stack limit
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************************************************************************/
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exp get_stack_limit
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PROTO_Z ()
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{
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return make_extn ("___m68k_stack_limit", ulongsh, 1);
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}
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/************************************************************************
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Make an exp representing the error handler
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************************************************************************/
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exp get_error_handler
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PROTO_Z ()
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{
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return make_extn ("___m68k_errhandler", ulongsh, 1);
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}
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/************************************************************************
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Make an exp representing env_size
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************************************************************************/
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exp get_env_size
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PROTO_N ( ( decl ) )
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PROTO_T ( dec *decl )
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{
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/* allocate space for 10 digits 2 prefix characters and a null */
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char* lab_name = alloc_nof ( char, 13 ) ;
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sprintf(lab_name, "#%c%lu", LPREFIX, (unsigned long) decl);
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return make_extn (lab_name, ulongsh, 1);
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}
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