mirror of https://github.com/FDOS/kernel.git
111 lines
5.1 KiB
C
111 lines
5.1 KiB
C
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/****************************************************************/
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/* */
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/* process.h */
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/* */
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/* DOS exec data structures & declarations */
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/* */
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/* November 23, 1991 */
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/* */
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/* Copyright (c) 1995 */
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/* Pasquale J. Villani */
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/* All Rights Reserved */
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/* */
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/* This file is part of DOS-C. */
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/* */
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/* DOS-C is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU General Public License */
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/* as published by the Free Software Foundation; either version */
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/* 2, or (at your option) any later version. */
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/* */
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/* DOS-C is distributed in the hope that it will be useful, but */
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/* WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
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/* the GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public */
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/* License along with DOS-C; see the file COPYING. If not, */
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/* write to the Free Software Foundation, 675 Mass Ave, */
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/* Cambridge, MA 02139, USA. */
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/****************************************************************/
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/* Modes available as first argument to the spawnxx functions. */
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#define P_WAIT 0 /* child runs separately, parent waits until exit */
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#define P_NOWAIT 1 /* both concurrent -- not implemented */
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#define P_OVERLAY 2 /* child replaces parent, parent no longer exists */
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typedef struct {
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union {
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struct {
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UWORD load_seg;
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UWORD reloc;
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} _load;
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struct {
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UWORD env_seg;
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CommandTail FAR *cmd_line;
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fcb FAR *fcb_1;
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fcb FAR *fcb_2;
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BYTE FAR *stack;
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BYTE FAR *start_addr;
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} _exec;
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} ldata;
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} exec_blk;
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#define exec ldata._exec
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#define load ldata._load
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typedef struct {
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UWORD ps_exit; /* 00 CP/M-like exit point: int 20 */
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UWORD ps_size; /* 02 segment of first byte beyond */
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/* memory allocated to program */
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BYTE ps_fill1; /* 04 single char fill=0 */
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/* CP/M-like entry point */
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/* offsets 5-9 are a far call to absolute address 0:00C0h
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encoded using 1MB wrap form of address (e.g. 0F01D:FEF0h)
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for compatiblity with CP/M apps that do a near call to psp:5
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and expect size (KB) of allocated segment in word at offset 6 */
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UBYTE ps_farcall; /* 05 far call opcode */
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VOID(FAR ASMCFUNC * ps_reentry) (void); /* 06 re-entry point */
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intvec ps_isv22, /* 0a terminate address */
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ps_isv23, /* 0e ctrl-break address */
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ps_isv24; /* 12 critical error address */
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UWORD ps_parent; /* 16 parent psp segment */
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UBYTE ps_files[20]; /* 18 file table - 0xff is unused */
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UWORD ps_environ; /* 2c environment paragraph */
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BYTE FAR *ps_stack; /* 2e user stack pointer - int 21 */
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UWORD ps_maxfiles; /* 32 maximum open files */
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UBYTE FAR *ps_filetab; /* 34 open file table pointer */
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VOID FAR *ps_prevpsp; /* 38 previous psp pointer */
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UBYTE ps_fill2; /* 3c unused */
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UBYTE ps_truename; /* 3d [unused] append truename flag int2f/B711h */
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UBYTE ps_netx_taskid[2]; /* 3e [Novell only field] task id */
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UWORD ps_retdosver; /* 40 [unused] version to return on int21/30h */
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UWORD pdb_next; /* 42 [Win only field] PSP chain */
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UBYTE ps_fill2b[4]; /* 44 unused, 4 bytes */
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UBYTE ps_olddos; /* 48 [Win only field] DOS/Win program */
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UBYTE ps_fill2c[7]; /* 49 unused, 7 bytes */
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UBYTE ps_unix[3]; /* 50 unix style call - 0xcd 0x21 0xcb */
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BYTE ps_fill3[9]; /* 53 */
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union {
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struct {
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fcb _ps_fcb1; /* 5c first command line argument */
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} _u1;
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struct {
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BYTE fill4[16];
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fcb _ps_fcb2; /* second command line argument */
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} _u2;
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struct {
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BYTE fill5[36];
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CommandTail _ps_cmd;
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} _u3;
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} _u;
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} psp;
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#define ps_fcb1 _u._u1._ps_fcb1
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#define ps_fcb2 _u._u2._ps_fcb2
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#define ps_cmd _u._u3._ps_cmd
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