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1.1 root 1: /* user.h 4.8 81/04/28 */
2:
3: #ifdef KERNEL
4: #include "../h/pcb.h"
5: #include "../h/dmap.h"
6: #include "../h/vtimes.h"
7: #include "assym.s"
8: #else
9: #include <sys/pcb.h>
10: #include <sys/dmap.h>
11: #include <sys/vtimes.h>
12: #endif
13: /*
14: * The user structure.
15: * One allocated per process.
16: * Contains all per process data
17: * that doesn't need to be referenced
18: * while the process is swapped.
19: * The user block is UPAGES*NBPG bytes
20: * long; resides at virtual user
21: * loc 0x80000000-UPAGES*NBPG; contains the system
22: * stack per user; is cross referenced
23: * with the proc structure for the
24: * same process.
25: */
26:
27: #define SHSIZE 32
28:
29: struct user
30: {
31: struct pcb u_pcb;
32: int u_arg[5]; /* arguments to current system call */
33: label_t u_qsav; /* for non-local gotos on interrupts */
34: char u_segflg; /* 0:user D; 1:system; 2:user I */
35: char u_error; /* return error code */
36: short u_uid; /* effective user id */
37: short u_gid; /* effective group id */
38: short u_ruid; /* real user id */
39: short u_rgid; /* real group id */
40: struct proc *u_procp; /* pointer to proc structure */
41: int *u_ap; /* pointer to arglist */
42: union { /* syscall return values */
43: struct {
44: int R_val1;
45: int R_val2;
46: } u_rv;
47: #define r_val1 u_rv.R_val1
48: #define r_val2 u_rv.R_val2
49: off_t r_off;
50: time_t r_time;
51: } u_r;
52: caddr_t u_base; /* base address for IO */
53: unsigned int u_count; /* bytes remaining for IO */
54: off_t u_offset; /* offset in file for IO */
55: struct inode *u_cdir; /* pointer to inode of current directory */
56: struct inode *u_rdir; /* root directory of current process */
57: char u_dbuf[DIRSIZ]; /* current pathname component */
58: caddr_t u_dirp; /* pathname pointer */
59: struct direct u_dent; /* current directory entry */
60: struct inode *u_pdir; /* inode of parent directory of dirp */
61: struct file *u_ofile[NOFILE]; /* pointers to file structures of open files */
62: char u_pofile[NOFILE]; /* per-process flags of open files */
63: #define EXCLOSE 01 /* auto-close on exec */
64: label_t u_ssav; /* label variable for swapping */
65: int (*u_signal[NSIG])(); /* disposition of signals */
66: int u_code; /* ``code'' to trap */
67: /* on SIGILL code passes compatibility mode fault address */
68: /* on SIGFPE code passes more specific kind of floating point fault */
69: int *u_ar0; /* address of users saved R0 */
70: struct uprof { /* profile arguments */
71: short *pr_base; /* buffer base */
72: unsigned pr_size; /* buffer size */
73: unsigned pr_off; /* pc offset */
74: unsigned pr_scale; /* pc scaling */
75: } u_prof;
76: char u_eosys; /* special action on end of syscall */
77: char u_sep; /* flag for I and D separation */
78: struct tty *u_ttyp; /* controlling tty pointer */
79: dev_t u_ttyd; /* controlling tty dev */
80: union {
81: struct { /* header of executable file */
82: int Ux_mag; /* magic number */
83: unsigned Ux_tsize; /* text size */
84: unsigned Ux_dsize; /* data size */
85: unsigned Ux_bsize; /* bss size */
86: unsigned Ux_ssize; /* symbol table size */
87: unsigned Ux_entloc; /* entry location */
88: unsigned Ux_unused;
89: unsigned Ux_relflg;
90: } Ux_A;
91: char ux_shell[SHSIZE]; /* #! and name of interpreter */
92: } u_exdata;
93: #define ux_mag Ux_A.Ux_mag
94: #define ux_tsize Ux_A.Ux_tsize
95: #define ux_dsize Ux_A.Ux_dsize
96: #define ux_bsize Ux_A.Ux_bsize
97: #define ux_ssize Ux_A.Ux_ssize
98: #define ux_entloc Ux_A.Ux_entloc
99: #define ux_unused Ux_A.Ux_unused
100: #define ux_relflg Ux_A.Ux_relflg
101:
102: char u_comm[DIRSIZ];
103: time_t u_start;
104: char u_acflag;
105: short u_fpflag; /* unused now, will be later */
106: short u_cmask; /* mask for file creation */
107: size_t u_tsize; /* text size (clicks) */
108: size_t u_dsize; /* data size (clicks) */
109: size_t u_ssize; /* stack size (clicks) */
110: struct vtimes u_vm; /* stats for this proc */
111: struct vtimes u_cvm; /* sum of stats for reaped children */
112: struct dmap u_dmap; /* disk map for data segment */
113: struct dmap u_smap; /* disk map for stack segment */
114: struct dmap u_cdmap, u_csmap; /* shadows of u_dmap, u_smap, for
115: use of parent during fork */
116: time_t u_outime; /* user time at last sample */
117: size_t u_odsize, u_ossize; /* for (clumsy) expansion swaps */
118: size_t u_vrpages[NOFILE]; /* number vread pages hanging on fd */
119: int u_limit[8]; /* see <sys/limit.h> */
120: #ifdef notdef
121: unsigned u_vsave; /* saved previous fault page number */
122: #endif
123: int u_stack[1];
124:
125: /*
126: * kernel stack per user
127: * extends from u + UPAGES*512
128: * backward not to reach here
129: */
130: /* SHOULD INSTEAD GROW STACK BACKWARDS ABOVE u. TOWARDS A VIRTUAL HOLE */
131: };
132:
133: /* u_eosys values */
134: #define JUSTRETURN 0
135: #define RESTARTSYS 1
136: #define SIMULATERTI 2
137:
138: /* u_error codes */
139: #include <errno.h>
140:
141: #ifdef KERNEL
142: extern struct user u;
143: extern struct user swaputl;
144: extern struct user forkutl;
145: extern struct user xswaputl;
146: extern struct user xswap2utl;
147: extern struct user pushutl;
148: extern struct user vfutl;
149: #endif
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