/* BEGIN INCLUDE FILE ... stack_header.incl.pl1 .. 3/72 Bill Silver */ /* modified 7/76 by M. Weaver for *system links and more system use of areas */ /* modified 3/77 by M. Weaver to add rnt_ptr */ /* Modified April 1983 by C. Hornig for tasking */ /****^ HISTORY COMMENTS: 1) change(86-06-24,DGHowe), approve(86-06-24,MCR7396), audit(86-08-05,Schroth), install(86-11-03,MR12.0-1206): added the heap_header_ptr definition. 2) change(86-08-12,Kissel), approve(86-08-12,MCR7473), audit(86-10-10,Fawcett), install(86-11-03,MR12.0-1206): Modified to support control point management. These changes were actually made in February 1985 by G. Palter. 3) change(86-10-22,Fawcett), approve(86-10-22,MCR7473), audit(86-10-22,Farley), install(86-11-03,MR12.0-1206): Remove the old_lot pointer and replace it with cpm_data_ptr. Use the 18 bit pad after cur_lot_size for the cpm_enabled. This was done to save some space int the stack header and change the cpd_ptr unal to cpm_data_ptr (ITS pair). END HISTORY COMMENTS */ /* format: style2 */ dcl sb ptr; /* the main pointer to the stack header */ dcl 1 stack_header based (sb) aligned, 2 pad1 (4) fixed bin, /* (0) also used as arg list by outward_call_handler */ 2 cpm_data_ptr ptr, /* (4) pointer to control point which owns this stack */ 2 combined_stat_ptr ptr, /* (6) pointer to area containing separate static */ 2 clr_ptr ptr, /* (8) pointer to area containing linkage sections */ 2 max_lot_size fixed bin (17) unal, /* (10) DU number of words allowed in lot */ 2 main_proc_invoked fixed bin (11) unal, /* (10) DL nonzero if main procedure invoked in run unit */ 2 have_static_vlas bit (1) unal, /* (10) DL "1"b if (very) large arrays are being used in static */ 2 pad4 bit (2) unal, 2 run_unit_depth fixed bin (2) unal, /* (10) DL number of active run units stacked */ 2 cur_lot_size fixed bin (17) unal, /* (11) DU number of words (entries) in lot */ 2 cpm_enabled bit (18) unal, /* (11) DL non-zero if control point management is enabled */ 2 system_free_ptr ptr, /* (12) pointer to system storage area */ 2 user_free_ptr ptr, /* (14) pointer to user storage area */ 2 null_ptr ptr, /* (16) */ 2 stack_begin_ptr ptr, /* (18) pointer to first stack frame on the stack */ 2 stack_end_ptr ptr, /* (20) pointer to next useable stack frame */ 2 lot_ptr ptr, /* (22) pointer to the lot for the current ring */ 2 signal_ptr ptr, /* (24) pointer to signal procedure for current ring */ 2 bar_mode_sp ptr, /* (26) value of sp before entering bar mode */ 2 pl1_operators_ptr ptr, /* (28) pointer to pl1_operators_$operator_table */ 2 call_op_ptr ptr, /* (30) pointer to standard call operator */ 2 push_op_ptr ptr, /* (32) pointer to standard push operator */ 2 return_op_ptr ptr, /* (34) pointer to standard return operator */ 2 return_no_pop_op_ptr ptr, /* (36) pointer to standard return / no pop operator */ 2 entry_op_ptr ptr, /* (38) pointer to standard entry operator */ 2 trans_op_tv_ptr ptr, /* (40) pointer to translator operator ptrs */ 2 isot_ptr ptr, /* (42) pointer to ISOT */ 2 sct_ptr ptr, /* (44) pointer to System Condition Table */ 2 unwinder_ptr ptr, /* (46) pointer to unwinder for current ring */ 2 sys_link_info_ptr ptr, /* (48) pointer to *system link name table */ 2 rnt_ptr ptr, /* (50) pointer to Reference Name Table */ 2 ect_ptr ptr, /* (52) pointer to event channel table */ 2 assign_linkage_ptr ptr, /* (54) pointer to storage for (obsolete) hcs_$assign_linkage */ 2 heap_header_ptr ptr, /* (56) pointer to the heap header for this ring */ 2 trace, 3 frames, 4 count fixed bin, /* (58) number of trace frames */ 4 top_ptr ptr unal, /* (59) pointer to last trace frame */ 3 in_trace bit (36) aligned, /* (60) trace antirecursion flag */ 2 pad2 bit (36), /* (61) */ 2 pad5 pointer; /* (62) pointer to future stuff */ /* The following offset refers to a table within the pl1 operator table. */ dcl tv_offset fixed bin init (361) internal static; /* (551) octal */ /* The following constants are offsets within this transfer vector table. */ dcl ( call_offset fixed bin init (271), push_offset fixed bin init (272), return_offset fixed bin init (273), return_no_pop_offset fixed bin init (274), entry_offset fixed bin init (275) ) internal static; /* The following declaration is an overlay of the whole stack header. Procedures which move the whole stack header should use this overlay. */ dcl stack_header_overlay (size (stack_header)) fixed bin based (sb); /* END INCLUDE FILE ... stack_header.incl.pl1 */ */ ----------------------------------------------------------- Historical Background This edition of the Multics software materials and documentation is provided and donated to Massachusetts Institute of Technology by Group Bull including Bull HN Information Systems Inc. as a contribution to computer science knowledge. This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology, Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell Bull Inc., Groupe Bull and Bull HN Information Systems Inc. to the development of this operating system. Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970), renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture for managing computer hardware properly and for executing programs. Many subsequent operating systems incorporated Multics principles. Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. . ----------------------------------------------------------- Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without fee is hereby granted,provided that the below copyright notice and historical background appear in all copies and that both the copyright notice and historical background and this permission notice appear in supporting documentation, and that the names of MIT, HIS, Bull or Bull HN not be used in advertising or publicity pertaining to distribution of the programs without specific prior written permission. Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc. Copyright 2006 by Bull HN Information Systems Inc. Copyright 2006 by Bull SAS All Rights Reserved */