COMPILATION LISTING OF SEGMENT get_kstep Compiled by: Multics PL/I Compiler, Release 32f, of October 9, 1989 Compiled at: Bull HN, Phoenix AZ, System-M Compiled on: 11/11/89 1010.0 mst Sat Options: optimize map 1 /****^ *********************************************************** 2* * * 3* * Copyright, (C) Honeywell Bull Inc., 1987 * 4* * * 5* * Copyright, (C) Honeywell Information Systems Inc., 1982 * 6* * * 7* * Copyright (c) 1972 by Massachusetts Institute of * 8* * Technology and Honeywell Information Systems, Inc. * 9* * * 10* *********************************************************** */ 11 12 13 get_kstep: 14 proc (a_segno, a_kstep, a_code); 15 16 /* 17* 18* Written March 1975 by R. Bratt 19* 20* get_kstep provides generally useful kste validation functions 21* 22* ---> get_kstep checks to see that the segment number is connected to a segment 23* USAGE: call get_kstep (segno,kstep,code); 24* 25* ---> get_kstep$dir checks to see that the segment number is connected to a non-phoney directory 26* USAGE: call get_kstep$dir (segno,kstep,code); 27* 28* 29* 30* segno fixed bin (17) - - - segment number 31* kstep ptr - - - pointer to the kstep 32* code fixed bin(35) - - - error code (output) 33* 34* */ 35 36 37 dcl a_kstep ptr, 38 dir bit (1) aligned init ("1"b), 39 a_code fixed bin (35), 40 (a_segno, segno) fixed bin (17); 41 42 dcl (error_table_$invalidsegno, error_table_$notadir) ext fixed bin (35); 43 44 /* START OF: kst.incl.pl1 * * * * * */ 1 2 1 3 /* 1 4*Modified March 1976 by R. Bratt 1 5*Modified November 1984 to remove hdr, Keith Loepere. */ 1 6 1 7 1 8 /****^ HISTORY COMMENTS: 1 9* 1) change(86-08-08,GDixon), approve(86-08-08,MCR7388), 1 10* audit(86-09-02,Farley), install(86-09-08,MR12.0-1150): 1 11* Add warning on use of kste.entryp. 1 12* END HISTORY COMMENTS */ 1 13 1 14 1 15 dcl pds$kstp ext ptr, 1 16 (kstp, kstep) ptr; 1 17 1 18 dcl 1 kst aligned based (kstp), /* KST header declaration */ 1 19 2 lowseg fixed bin (17), /* lowest segment number described by kst */ 1 20 2 highseg fixed bin (17), /* highest segment number described by kst */ 1 21 2 highest_used_segno fixed bin (17), /* highest segment number yet used */ 1 22 2 lvs fixed bin (8), /* number of private LVs this process is connected to */ 1 23 2 time_of_bootload fixed bin (71), /* bootload time during prelinking */ 1 24 2 garbage_collections fixed bin (17) unaligned, /* KST garbage collections */ 1 25 2 entries_collected fixed bin (17) unaligned, /* KST entries recovered by garbage collection */ 1 26 2 free_list bit (18) unaligned, /* relative pointer to first free kste */ 1 27 2 prelinked_ring (7) bit (1) unaligned, /* rings prelinked in process */ 1 28 2 template bit (1) unaligned, /* this is a template kst if set */ 1 29 2 allow_256K_connect bit (1) unaligned, /* can use 256K segments */ 1 30 2 unused_2 bit (9) unaligned, 1 31 2 uid_hash_bucket (0 : 127) bit (18) unaligned, /* hash buckets */ 1 32 2 kst_entry (0 refer (kst.lowseg):0 refer (kst.highseg)) aligned like kste, /* kst entries */ 1 33 2 lv (1:256) bit (36), /* private logical volume connection list */ 1 34 2 end_of_kst bit (36); 1 35 1 36 dcl 1 kste based (kstep) aligned, /* KST entry declaration */ 1 37 2 fp bit (18) unaligned, /* forward rel pointer */ 1 38 2 segno fixed bin (17) unaligned, /* segment number of this kste */ 1 39 2 usage_count (0:7) fixed bin (8) unaligned, /* outstanding initiates/ring */ 1 40 2 entryp ptr unaligned, /* branch pointer */ 1 41 /* See WARNING below for requirements to use entryp. */ 1 42 2 uid bit (36) aligned, /* unique identifier */ 1 43 2 access_information unaligned, 1 44 3 dtbm bit (36), /* date time branch modified */ 1 45 3 extended_access bit (33), /* extended access from the branch */ 1 46 3 access bit (3), /* rew */ 1 47 3 ex_rb (3) bit (3), /* ring brackets from branch */ 1 48 2 pad1 bit (3) unaligned, 1 49 2 flags unaligned, 1 50 3 dirsw bit (1), /* directory switch */ 1 51 3 allow_write bit (1), /* set if initiated with write permission */ 1 52 3 priv_init bit (1), /* privileged initiation */ 1 53 3 tms bit (1), /* transparent modification switch */ 1 54 3 tus bit (1), /* transparent usage switch */ 1 55 3 tpd bit (1), /* transparent paging device switch */ 1 56 3 audit bit (1), /* audit switch */ 1 57 3 explicit_deact_ok bit (1), /* set if I am willing to have a user force deactivate */ 1 58 3 pad bit (3), 1 59 2 infcount fixed bin (12) unaligned; /* _i_f dirsw _t_h_e_n inferior count _e_l_s_e lv index */ 1 60 1 61 1 62 /* * * * * * * * * * * * * * * * * * * * * * * * * * */ 1 63 /* */ 1 64 /* WARNING: Before using kste.entryp to get a pointer to the directory */ 1 65 /* entry associated with the kst entry, you must first validate its value */ 1 66 /* by calling sum$getbranch or sum$getbranch_root_my. This call also locks */ 1 67 /* the containing directory. The containing directory must remain locked */ 1 68 /* during the entire period when kste.entryp and the directory entry are */ 1 69 /* being referenced. Once the directory is unlocked, kste.entryp can no */ 1 70 /* longer be used to get a pointer to the entry within the unlocked */ 1 71 /* directory since the dir entry could have been moved within the directory */ 1 72 /* by another processor. */ 1 73 /* */ 1 74 /* If you only need a pointer to the directory containing the associated */ 1 75 /* dir entry (but not to the dir entry itself), you can use: */ 1 76 /* pointer (kste.entryp, 0) */ 1 77 /* without calling sum to lock the directory and validate entryp. GDixon */ 1 78 /* */ 1 79 /* * * * * * * * * * * * * * * * * * * * * * * * * * */ 1 80 1 81 /* END OF: kst.incl.pl1 * * * * * */ 44 45 46 dir = "0"b; 47 48 dir: entry (a_segno, a_kstep, a_code); 49 50 segno = a_segno; 51 a_kstep = null(); 52 a_code = 0; 53 kstp = pds$kstp; 54 if segno < kst.lowseg | segno > kst.highest_used_segno 55 then do; 56 err: a_code = error_table_$invalidsegno; 57 return; 58 end; 59 kstep = addr (kst.kst_entry (segno)); 60 if unspec (kste.entryp) = "0"b then go to err; 61 if dir 62 then if ^kste.dirsw | kste.uid = "0"b 63 then do; 64 a_code = error_table_$notadir; 65 return; 66 end; 67 a_kstep = kstep; 68 return; 69 70 end get_kstep; SOURCE FILES USED IN THIS COMPILATION. LINE NUMBER DATE MODIFIED NAME PATHNAME 0 11/11/89 0839.4 get_kstep.pl1 >special_ldd>install>MR12.3-1114>get_kstep.pl1 44 1 09/18/86 1308.1 kst.incl.pl1 >ldd>include>kst.incl.pl1 NAMES DECLARED IN THIS COMPILATION. IDENTIFIER OFFSET LOC STORAGE CLASS DATA TYPE ATTRIBUTES AND REFERENCES (* indicates a set context) NAMES DECLARED BY DECLARE STATEMENT. a_code parameter fixed bin(35,0) dcl 37 set ref 13 48 52* 56* 64* a_kstep parameter pointer dcl 37 set ref 13 48 51* 67* a_segno parameter fixed bin(17,0) dcl 37 ref 13 48 50 dir 000100 automatic bit(1) initial dcl 37 set ref 37* 46* 61 dirsw 7(12) based bit(1) level 3 packed packed unaligned dcl 1-36 ref 61 entryp 3 based pointer level 2 packed packed unaligned dcl 1-36 ref 60 error_table_$invalidsegno 000010 external static fixed bin(35,0) dcl 42 ref 56 error_table_$notadir 000012 external static fixed bin(35,0) dcl 42 ref 64 flags 7(12) based structure level 2 packed packed unaligned dcl 1-36 highest_used_segno 2 based fixed bin(17,0) level 2 dcl 1-18 ref 54 kst based structure level 1 dcl 1-18 kst_entry 110 based structure array level 2 dcl 1-18 set ref 59 kste based structure level 1 dcl 1-36 kstep 000104 automatic pointer dcl 1-15 set ref 59* 60 61 61 67 kstp 000102 automatic pointer dcl 1-15 set ref 53* 54 54 59 lowseg based fixed bin(17,0) level 2 dcl 1-18 ref 54 59 pds$kstp 000014 external static pointer dcl 1-15 ref 53 segno 000101 automatic fixed bin(17,0) dcl 37 set ref 50* 54 54 59 uid 4 based bit(36) level 2 dcl 1-36 ref 61 NAMES DECLARED BY EXPLICIT CONTEXT. dir 000031 constant entry external dcl 48 err 000057 constant label dcl 56 ref 60 get_kstep 000017 constant entry external dcl 13 NAMES DECLARED BY CONTEXT OR IMPLICATION. addr builtin function ref 59 null builtin function ref 51 unspec builtin function ref 60 STORAGE REQUIREMENTS FOR THIS PROGRAM. Object Text Link Symbol Defs Static Start 0 0 170 206 112 200 Length 372 112 16 147 56 0 BLOCK NAME STACK SIZE TYPE WHY NONQUICK/WHO SHARES STACK FRAME get_kstep 72 external procedure is an external procedure. STORAGE FOR AUTOMATIC VARIABLES. STACK FRAME LOC IDENTIFIER BLOCK NAME get_kstep 000100 dir get_kstep 000101 segno get_kstep 000102 kstp get_kstep 000104 kstep get_kstep THE FOLLOWING EXTERNAL OPERATORS ARE USED BY THIS PROGRAM. return_mac ext_entry NO EXTERNAL ENTRIES ARE CALLED BY THIS PROGRAM. THE FOLLOWING EXTERNAL VARIABLES ARE USED BY THIS PROGRAM. error_table_$invalidsegno error_table_$notadir pds$kstp LINE LOC LINE LOC LINE LOC LINE LOC LINE LOC LINE LOC LINE LOC 37 000007 13 000013 46 000025 48 000026 50 000037 51 000042 52 000044 53 000045 54 000051 56 000057 57 000063 59 000064 60 000074 61 000076 64 000105 65 000107 67 000110 68 000111 ----------------------------------------------------------- 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