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Annotation of 41BSD/4.0.upgrade/sys/h/user.h, revision 1.1

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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