Subversion Repositories tendra.SVN

/*
    Copyright (c) 1993 Open Software Foundation, Inc.


    All Rights Reserved


    Permission to use, copy, modify, and distribute this software
    and its documentation for any purpose and without fee is hereby
    granted, provided that the above copyright notice appears in all
    copies and that both the copyright notice and this permission
    notice appear in supporting documentation.


    OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING
    ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
    PARTICULAR PURPOSE.


    IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
    CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
    NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
    WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

/*
                 Crown Copyright (c) 1997
    
    This TenDRA(r) Computer Program is subject to Copyright
    owned by the United Kingdom Secretary of State for Defence
    acting through the Defence Evaluation and Research Agency
    (DERA).  It is made available to Recipients with a
    royalty-free licence for its use, reproduction, transfer
    to other parties and amendment for any purpose not excluding
    product development provided that any such use et cetera
    shall be deemed to be acceptance of the following conditions:-
    
        (1) Its Recipients shall ensure that this Notice is
        reproduced upon any copies or amended versions of it;
    
        (2) Any amended version of it shall be clearly marked to
        show both the nature of and the organisation responsible
        for the relevant amendment or amendments;
    
        (3) Its onward transfer from a recipient to another
        party shall be deemed to be that party's acceptance of
        these conditions;
    
        (4) DERA gives no warranty or assurance as to its
        quality or suitability for any purpose and DERA accepts
        no liability whatsoever in relation to any use to which
        it may be put.
*/



/**********************************************************************
$Author: release $
$Date: 1998/02/04 15:49:10 $
$Revision: 1.2 $
$Log: stack.h,v $
 * Revision 1.2  1998/02/04  15:49:10  release
 * Added OSF copyright message.
 *
 * Revision 1.1.1.1  1998/01/17  15:55:58  release
 * First version to be checked into rolling release.
 *
 * Revision 1.2  1996/10/04  16:04:30  pwe
 * add banners and mod for PWE ownership
 *
**********************************************************************/


#ifndef STACK_H
#define STACK_H  1

#define ALIGNNEXT(bitposn, bitalign)    (((bitposn)+(bitalign)-1) & ~((bitalign)-1))
#define ALLOCA_ALIGNMENT(n) ((n+7) & ~7)

/* Stack frame layout, from Assembler Reference manual page 4-19, in bytes */
#define STACK_LINK_AREA_SIZE            24
#define STACK_BACK_CHAIN                0
#define STACK_SAVED_CR                  4
#define STACK_SAVED_LR                  8
#define STACK_RESERVED1                 12
#define STACK_RESERVED2                 16
#define STACK_SAVED_TOC                 20
#define STACK_ARG_AREA                  STACK_LINK_AREA_SIZE

#define STACK_FIXED_REG_DUMP_AREA_SIZE  (19*4)          /* 19 fixed point */
#define STACK_FLOAT_REG_DUMP_AREA_SIZE  ((18*2)*4)      /* 18 doubles */
#define STACK_REG_DUMP_AREA_SIZE        (ALIGNNEXT(STACK_FIXED_REG_DUMP_AREA_SIZE,8) \
                                                   +STACK_FLOAT_REG_DUMP_AREA_SIZE)
#define STACK_MIN_MAXARGS               (8*4)           /* 8 words of params */

/* info on the stack frame of current proc being coded */
extern long p_no_of_returns;
extern long p_sreg_first_save;
extern long p_sfreg_first_save;
extern long p_frame_size;
extern long p_locals_offset;
extern long p_maxargbytes;

extern long p_args_and_link_size;/* maximum size of parameter list + LINK_AREA size in bytes */
extern bool p_has_fp;
extern bool p_has_saved_sp;
extern bool p_leaf;
extern bool p_has_back_chain;
extern bool p_has_alloca;
extern bool p_save_all_sregs;
extern bool p_has_vcallees;
extern bool p_has_no_vcallers;
extern long p_fixed_params;
extern long p_float_params;
extern long p_saved_sp_offset;
extern long p_callee_size;
extern bool p_has_tp;
extern int p_return_label;
extern ans p_result;/* what the result of the proc is */
extern exp p_current;
extern void generate_procedure_prologue PROTO_S ((void));
extern void generate_procedure_epilogue PROTO_S ((void));
extern void generate_untidy_procedure_epilogue PROTO_S ((void));
extern void save_sp_on_stack PROTO_S ((void));
extern void get_sp_from_stack PROTO_S ((void));
extern void save_back_chain_using_frame_pointer PROTO_S ((void));
extern void initialise_procedure PROTO_S ((procrec *));
extern void restore_sregs PROTO_S ((int,int));
extern void restore_link_register PROTO_S ((void));
#define EXTRA_CALLEE_BYTES 8 /* the number of bytes added on to the callees i.e 4 to hold saved chain*/

#endif