; **************************************************************************** ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.9) - UNINITIALIZED USER DATA : ubss.s ; ---------------------------------------------------------------------------- ; Last Update: 19/08/2024 (Previous: 07/08/2022) ; ---------------------------------------------------------------------------- ; Beginning: 24/01/2016 ; ---------------------------------------------------------------------------- ; Assembler: NASM version 2.15 (trdos386.s) ; ---------------------------------------------------------------------------- ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan ; ux.s (04/12/2015) ; **************************************************************************** ; Retro UNIX 386 v1 Kernel - ux.s ; Last Modification: 04/12/2015 ; ; ///////// RETRO UNIX 386 V1 SYSTEM DEFINITIONS /////////////// ; (Modified from ; Retro UNIX 8086 v1 system definitions in 'UNIX.ASM', 01/09/2014) ; ((UNIX.ASM (RETRO UNIX 8086 V1 Kernel), 11/03/2013 - 01/09/2014)) ; ---------------------------------------------------------------------------- ; Derived from UNIX Operating System (v1.0 for PDP-11) ; (Original) Source Code by Ken Thompson (1971-1972) ; ; ; (Section E10 (17/3/1972) - ux.s) ; **************************************************************************** ; Ref: Retro UNIX 386 v1.2 Kernel (v0.2.2.3) - ux.s - 15/07/2022 alignb 2 %if 0 inode: ;; 11/03/2013. ;;Derived from UNIX v1 source code 'inode' structure (ux). ;;i. ; ;i.flgs: resw 1 ;i.nlks: resb 1 ;i.uid: resb 1 ;i.size: resw 1 ; size ;i.dskp: resw 8 ; 16 bytes ;i.ctim: resd 1 ;i.mtim: resd 1 ;i.rsvd: resw 1 ; Reserved (ZERO/Undefined word for UNIX v1) ; 26/01/2020 ; Retro UNIX 386 v2.0 - Modified UNIX v7 inode model ; (15/09/2029 .. 18/12/2019) i.flgs: resw 1 ; /* mode and type of file */ i.nlks: resw 1 ; /* number of links to file */ i.uid: resw 1 ; /* owner's user id */ - 0 to 65535 - i.gid: resb 1 ; /* owner's group id */ - o to 255 - i.size_h: resb 1 ; /* number of bytes in file */ ; byte 5 i.size: resd 1 ; size ; /* number of bytes in file */ i.dskp: resd 10 ; 40 bytes ; /* disk block addresses */ i.atim: resd 1 ; /* time last accessed */ i.mtim: resd 1 ; /* time last modified */ i.ctim: resd 1 ; /* time created */ I_SIZE equ $ - inode %endif process: ; 23/07/2022 - TRDOS 386 Kernel v2.0.5 ; 27/02/2022 ; 12/01/2022 - Retro UNIX 386 v1.2 ; 19/12/2016 ; 21/05/2016 ; 19/05/2016 - TRDOS 386 (TRDOS v2.0) ; 06/05/2015 - Retro UNIX 386 v1 ; 11/03/2013 - 05/02/2014 (Retro UNIX 8086 v1) ;Derived from UNIX v1 source code 'proc' structure (ux). ;p. p.pid: resw nproc p.ppid: resw nproc ;p.break: resw nproc ; 12/01/2022 (p.break is not used) p.ttyc: resb nproc ; console tty in Retro UNIX 8086 v1. ; 27/02/2022 (p.waitc is not used) ;p.waitc: resb nproc ; waiting channel in Retro UNIX 8086 v1. p.link: resb nproc p.stat: resb nproc ; 06/05/2015 (Retro UNIX 386 v1 feature only !) p.upage: resd nproc ; Physical address of the process's ; 'user' structure ; 21/05/2016 ; 19/05/2016 (TRDOS 386 feature only!) p.timer: resb nproc ; number of timer events of the processs ; 19/12/2016 p.tcb: resd nproc ; timer callback service address (if > 0) ; 18/08/2024 (TRDOS 386 v2.0.9) p.exitc: resb nproc ; exit code of the child P_SIZE equ $ - process ; fsp table (original UNIX v1) ; ;Entry ; 15 0 ; 1 |---|---------------------------------------| ; |r/w| i-number of open file | ; |---|---------------------------------------| ; | device number | ; |-------------------------------------------| ; (*) | offset pointer, i.e., r/w pointer to file | ; |-------------------------------------------| ; | flag that says | number of processes | ; | file deleted | that have file open | ; |-------------------------------------------| ; 2 | | ; |-------------------------------------------| ; | | ; |-------------------------------------------| ; | | ; |-------------------------------------------| ; | | ; |-------------------------------------------| ; 3 | | ; | | ; ; (*) Retro UNIX 386 v1 modification: 32 bit offset pointer ; 27/03/2020 - Retro UNIX 386 v2 - FSP (OPEN FILES) TABLE ;Entry ; 15 7 0 ; 1 |-------------------------------------------| ; | i-number of open file | ; |-------------------------------------------| ; | high word of 32 bit i-number | ; |-------------------------------------------| ; | open mode & status | device number | ; |-------------------------------------------| ; | reserved byte | open count | ; |-------------------------------------------| ; | offset pointer, i.e., r/w pointer to file | ; |-------------------------------------------| ; | 64 bit file offset pointer (bit 16-31) | ; |-------------------------------------------| ; | 64 bit file offset pointer (bit 32-47) | ; |-------------------------------------------| ; | 64 bit file offset pointer (bit 48-63) | ; |-------------------------------------------| ; 2 | | ; |-------------------------------------------| ; | | ; |-------------------------------------------| ; | | ; |-------------------------------------------| ; | | ; |-------------------------------------------| ; | | %if 0 ; (Retro UNIX 386 v1.2 - ux.s - 15/07/2022) ; 22/11/2021 ; 21/07/2021 - Retro UNIX 386 v2 open file structure revision struc file ; open files (fsp) structure ; (*) .inode: resw 1 ; inode number of open file (32 bit) .i32: resw 1 ; higher word of inode number (reserved) .drive: resb 1 ; logical drive (disk) number .flags: resb 1 ; open mode and status .count: resb 1 ; number of processes that have file open ;.rsvd: resb 1 ; reserved byte (for next versions) .mnt: resb 1 ; mnttab index+1 (0 = not mounted) .offset: resd 1 ; file offset/pointer (64 bit) .o64: resd 1 ; higher 32 bit of file offset .size: ; = 16 endstruc %endif ; 23/07/2022 ;fsp: resb nfiles * 16 ; (*) idev: resb 1 cdev: resb 1 ; 15/04/2015 ;fsp: resb nfiles * 10 ; 11/05/2015 (8 -> 10) ;idev: resw 1 ; device number is 1 byte in Retro UNIX 8086 v1 ! ;cdev: resw 1 ; device number is 1 byte in Retro UNIX 8086 v1 ! ; 18/05/2015 ; 26/04/2013 device/drive parameters (Retro UNIX 8086 v1 feature only!) ; 'UNIX' device numbers (as in 'cdev' and 'u.cdrv') ; 0 -> root device (which has Retro UNIX 8086 v1 file system) ; 1 -> mounted device (which has Retro UNIX 8086 v1 file system) ; 'Retro UNIX 8086 v1' device numbers: (for disk I/O procedures) ; 0 -> fd0 (physical drive, floppy disk 1), physical drive number = 0 ; 1 -> fd1 (physical drive, floppy disk 2), physical drive number = 1 ; 2 -> hd0 (physical drive, hard disk 1), physical drive number = 80h ; 3 -> hd1 (physical drive, hard disk 2), physical drive number = 81h ; 4 -> hd2 (physical drive, hard disk 3), physical drive number = 82h ; 5 -> hd3 (physical drive, hard disk 4), physical drive number = 83h rdev: resb 1 ; root device number ; Retro UNIX 8086 v1 feature only! ; as above, for physical drives numbers in following table mdev: resb 1 ; mounted device number ; Retro UNIX 8086 v1 feature only! ; 23/07/2022 ;; 15/04/2015 ;active: resb 1 ; resb 1 ; 09/06/2015 ; 23/07/2022 ;mnti: resw 1 ; 07/08/2022 mpid: resw 1 ;rootdir: resw 1 rootdir: resd 1 ; 21/05/2016 - TRDOS 386 (TRDOS v2.0) - priority levels, 3 run queues runq: runq_event: resw 1 ; high priority, 'run for event' ; 2 runq_normal: resw 1 ; normal/regular priority, 'run as reqular' ; 1 runq_background: resw 1 ; low priority, 'run on background' ; 0 ; ; 23/07/2022 ;imod: resb 1 ;smod: resb 1 ;mmod: resb 1 sysflg: resb 1 resb 1 alignb 4 user: ; 23/07/2022 - TRDOS 386 Kernel v2.0.5 ; 04/12/2021 - Retro UNIX 386 v1.2 ; 13/01/2017 ; 19/12/2016 ; 21/05/2016 - TRDOS 386 (TRDOS v2.0) ; [u.pri] usage method modification ; 04/12/2015 ; 18/10/2015 ; 12/10/2015 ; 21/09/2015 ; 24/07/2015 ; 16/06/2015 ; 09/06/2015 ; 11/05/2015 ; 16/04/2015 (Retro UNIX 386 v1 - 32 bit modifications) ; 10/10/2013 ; 11/03/2013. ;Derived from UNIX v1 source code 'user' structure (ux). ;u. u.sp: resd 1 ; esp (kernel stack at the beginning of 'sysent') u.usp: resd 1 ; esp (kernel stack points to user's registers) u.r0: resd 1 ; eax u.cdir: resw 1 resw 1 ; 23/07/2022 u.cdrv: resb 1 ; 23/07/2022 resb 1 u.fp: resb 10 ;u.fp: resb OPENFILES ; 23/07/202 u.fsp: ; 23/07/2022 u.fofp: resd 1 u.dirp: resd 1 u.namep: resd 1 u.off: resd 1 ; resd 1 ; 23/07/2022 (64 bit fptr) u.base: resd 1 u.count: resd 1 u.nread: resd 1 u.break: resd 1 ; break ; 10/01/2017 (TRDOS 386, relocation and dword alignment) ; tty number (rtty, rcvt, wtty) u.ttyp: resw 1 u.ttyn: resb 1 ; 28/07/2013 - Retro Unix 8086 v1 feature only ! u.mode: resb 1 ; 23/07/2022 ;u.resb: resb 1 ; 10/01/2017 (TRDOS 386, temporary) u.dirbuf: resb 16 ; 04/12/2015 (10 -> 16) ;u.pri: resw 1 ; 14/02/2014 u.quant: resb 1 ; Retro UNIX 8086 v1 Feature only ! (uquant) resb 1 ; 23/07/2022 u.pri: resb 1 ; Modification: 21/05/2016 (priority levels: 0, 1, 2) resb 1 ; 23/07/2022 u.intr: resw 1 u.quit: resw 1 ;u.emt: resw 1 ; 10/10/2013 ;u.ilgins: resw 1 ; 10/01/2017 ;u.cdrv: resw 1 ; cdev u.bsys: resb 1 u.uno: resb 1 ; 23/07/2022 ;u.uid: resw 1 ; uid ; 27/03/2021 - Retro UNIX 386 v2 ;u.ruid: resw 1 ; 16 bit uid ;u.gid: resb 1 ; gid ; 27/03/2021 - Retro UNIX 386 v2 ;u.rgid: resb 1 ; 23/07/2022 ;u.procp: resd 1 ; /* pointer to proc structure */ u.uid: resb 1 ; uid u.ruid: resb 1 u.upage: resd 1 ; 16/04/2015 - Retro Unix 386 v1 feature only ! u.pgdir: resd 1 ; 09/03/2015 (page dir addr of process) u.ppgdir: resd 1 ; 06/05/2015 (page dir addr of the parent process) u.pbase: resd 1 ; 20/05/2015 (physical base/transfer address) u.pcount: resw 1 ; 20/05/2015 (byte -transfer- count for page) ;u.pncount: resw 1 ; 16/06/2015 (byte -transfer- count for page, 'namei', 'mkdir') ;u.pnbase: resd 1 ; 16/06/2015 (physical base/transfer address, 'namei', 'mkdir') ; 09/06/2015 u.kcall: resb 1 ; The caller is 'namei' (dskr) or 'mkdir' (dskw) sign u.brwdev: resb 1 ; Block device number for direct I/O (bread & bwrite) ; 24/07/2015 - 24/06/2015 ;u.args: resd 1 ; arguments list (line) offset from start of [u.upage] ; (arg list/line is from offset [u.args] to 4096 in [u.upage]) ; ([u.args] points to argument count -argc- address offset) ; 24/06/2015 ;u.core: resd 1 ; physical start address of user's memory space (for sys exec) ;u.ecore: resd 1 ; physical end address of user's memory space (for sys exec) ;;; ; 19/08/2024 ; TRDOS 386 v2.0.9 ; STDIN/STDOUT/STDERR u.stdin: resb 1 ; 0 is tty-r or > 0 is file (redirection) u.stdout: resb 1 ; 0 is tty-w or > 0 is file (redirection) u.ungetc: resb 1 ; u.getc is valid if u.ungetc > 0 u.getc: resb 1 ; last char read on stdin ;;; ; last error number u.error: resd 1 ; 28/07/2013 - 09/03/2015 ; Retro UNIX 8086/386 v1 feature only! ; 21/09/2015 (debugging - page fault analyze) u.pfcount: resd 1 ; page fault count for (this) process (for sys geterr) ; 19/12/2016 (TRDOS 386) u.tcb: resd 1 ; Timer callback address/flag which will be used by timer int ; 13/01/2017 (TRDOS 386) u.t_lock: resb 1 ; Timer interrupt (callback) lock (unlocked by 'sysrele') u.t_mode: resb 1 ; running mode during timer interrupt (0= system, 0FFh= user) ; 26/02/2017 (TRDOS 386) u.irqc: resb 1 ; Count of IRQ callback services (IRQs in use) ; 28/02/2017 (TRDOS 386) u.irqwait: resb 1 ; IRQ waiting for callback service flag (IRQ number, If > 0) u.r_lock: resb 1 ; 'IRQ callback service is in progress' flag (IRQ lock) u.r_mode: resb 1 ; running mode during hadware interrupt ; 23/07/2022 u.exit: resb 1 ; exit code ; 27/02/2017 (TRDOS 386) u.fpsave: resb 1 ; TRDOS 386, 'save/restore FPU registers' flag alignb 4 ; !! wrong sizing in TRDOS 386 v2.0.4 (in 'ubss.s', 28/02/2017) !! ;u.fpregs: resb 94 ; 94 byte area for saving and restoring FPU registers ; 23/07/2022 u.fpregs: resb 108 ; 108 byte area for saving and restoring FPU registers alignb 4 U_SIZE equ $ - user ; 18/10/2015 - Retro UNIX 386 v1 (local variables for 'namei' and 'sysexec') pcore: resd 1 ; physical start address of user's memory space (for sys exec) ecore: resd 1 ; physical address of user's stack/last page (for sys exec) nbase: resd 1 ; physical base address for 'namei' & 'sysexec' ; 23/07/202 - TRDOS 386 Kernel v2.0.5 ;ncount: resw 1 ncount: resd 1 ; remain byte count in page for 'namei' & 'sysexec' ;argc: resw 1 argc: resd 1 ; argument count for 'sysexec' argv: resd 1 ; argument list (recent) address for 'sysexec' ; 03/06/2015 - Retro UNIX 386 v1 Beginning ; 07/04/2013 - 31/07/2013 - Retro UNIX 8086 v1 rw: resb 1 ;; Read/Write sign (iget) ; 23/07/2022 resb 3 alignb 4 ; 24/04/2016 ii: resd 1 ; first cluster of the program file i.size: resd 1 ; size of the program file