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Annotation of researchv8dc/sys/h/user.h, revision 1.1

1.1     ! root        1: #ifdef KERNEL
        !             2: #include "../h/pcb.h"
        !             3: #include "../h/dmap.h"
        !             4: #include "../h/vtimes.h"
        !             5: #else
        !             6: #include <sys/pcb.h>
        !             7: #include <sys/dmap.h>
        !             8: #include <sys/vtimes.h>
        !             9: #endif
        !            10: /*
        !            11:  * The user structure.
        !            12:  * One allocated per process.
        !            13:  * Contains all per process data
        !            14:  * that doesn't need to be referenced
        !            15:  * while the process is swapped.
        !            16:  * The user block is UPAGES*NBPG bytes
        !            17:  * long; resides at virtual user
        !            18:  * loc 0x80000000-UPAGES*NBPG; contains the system
        !            19:  * stack per user; is cross referenced
        !            20:  * with the proc structure for the
        !            21:  * same process.
        !            22:  */
        !            23:  
        !            24: #define        SHSIZE  32
        !            25:  
        !            26: struct user
        !            27: {
        !            28:        struct  pcb u_pcb;
        !            29:        int     u_arg[5];               /* arguments to current system call */
        !            30:        label_t u_qsav;                 /* for non-local gotos on interrupts */
        !            31:        char    u_segflg;               /* 0:user D; 1:system; 2:user I */
        !            32:        char    u_error;                /* return error code */
        !            33:        short   u_uid;                  /* effective user id */
        !            34:        short   u_gid;                  /* effective group id */
        !            35:        short   u_ruid;                 /* real user id */
        !            36:        short   u_rgid;                 /* real group id */
        !            37:        struct  proc *u_procp;          /* pointer to proc structure */
        !            38:        int     *u_ap;                  /* pointer to arglist */
        !            39:        union {                         /* syscall return values */
        !            40:                struct  {
        !            41:                        int     R_val1;
        !            42:                        int     R_val2;
        !            43:                } u_rv;
        !            44: #define        r_val1  u_rv.R_val1
        !            45: #define        r_val2  u_rv.R_val2
        !            46:                off_t   r_off;
        !            47:                time_t  r_time;
        !            48:        } u_r;
        !            49:        caddr_t u_base;                 /* base address for IO */
        !            50:        unsigned int u_count;           /* bytes remaining for IO */
        !            51:        off_t   u_offset;               /* offset in file for IO */
        !            52:        struct  inode *u_cdir;          /* pointer to inode of current directory */
        !            53:        struct  inode *u_rdir;          /* root directory of current process */
        !            54:        char    u_dbuf[DIRSIZ];         /* current pathname component */
        !            55:        caddr_t u_dirp;                 /* pathname pointer */
        !            56:        struct  direct u_dent;          /* current directory entry */
        !            57:        struct  inode *u_pdir;          /* inode of parent directory of dirp */
        !            58:        struct  file *u_ofile[NOFILE];  /* pointers to file structures of open files */
        !            59:        char    u_pofile[NOFILE];       /* per-process flags of open files */
        !            60: #define        EXCLOSE 01              /* auto-close on exec */
        !            61: #define        POALOCK 02              /* advisory lock set */
        !            62:        label_t u_ssav;                 /* label variable for swapping */
        !            63:        int     (*u_signal[NSIG])();    /* disposition of signals */
        !            64:        int     u_code;                 /* ``code'' to trap */
        !            65: /* on SIGILL code passes compatibility mode fault address  */
        !            66: /* on SIGFPE code passes more specific kind of floating point fault */
        !            67:        int     *u_ar0;                 /* address of users saved R0 */
        !            68:        struct uprof {                  /* profile arguments */
        !            69:                short   *pr_base;       /* buffer base */
        !            70:                unsigned pr_size;       /* buffer size */
        !            71:                unsigned pr_off;        /* pc offset */
        !            72:                unsigned pr_scale;      /* pc scaling */
        !            73:        } u_prof;
        !            74:        char    u_eosys;                /* special action on end of syscall */
        !            75:        char    u_sep;                  /* flag for I and D separation */
        !            76:        dev_t   u_ttydev;               /* dev,ino of controlling tty */
        !            77:        ino_t   u_ttyino;
        !            78:        union {
        !            79:           struct {                     /* header of executable file */
        !            80:                int     Ux_mag;         /* magic number */
        !            81:                unsigned Ux_tsize;      /* text size */
        !            82:                unsigned Ux_dsize;      /* data size */
        !            83:                unsigned Ux_bsize;      /* bss size */
        !            84:                unsigned Ux_ssize;      /* symbol table size */
        !            85:                unsigned Ux_entloc;     /* entry location */
        !            86:                unsigned Ux_unused;
        !            87:                unsigned Ux_relflg;
        !            88:           } Ux_A;
        !            89:           char ux_shell[SHSIZE];       /* #! and name of interpreter */
        !            90:        } u_exdata;
        !            91: #define        ux_mag          Ux_A.Ux_mag
        !            92: #define        ux_tsize        Ux_A.Ux_tsize
        !            93: #define        ux_dsize        Ux_A.Ux_dsize
        !            94: #define        ux_bsize        Ux_A.Ux_bsize
        !            95: #define        ux_ssize        Ux_A.Ux_ssize
        !            96: #define        ux_entloc       Ux_A.Ux_entloc
        !            97: #define        ux_unused       Ux_A.Ux_unused
        !            98: #define        ux_relflg       Ux_A.Ux_relflg
        !            99: 
        !           100:        char    u_comm[DIRSIZ];
        !           101:        time_t  u_start;
        !           102:        char    u_acflag;
        !           103:        short   u_fpflag;               /* unused now, will be later */
        !           104:        short   u_cmask;                /* mask for file creation */
        !           105:        size_t  u_tsize;                /* text size (clicks) */
        !           106:        size_t  u_dsize;                /* data size (clicks) */
        !           107:        size_t  u_ssize;                /* stack size (clicks) */
        !           108:        struct  vtimes u_vm;            /* stats for this proc */
        !           109:        struct  vtimes u_cvm;           /* sum of stats for reaped children */
        !           110:        struct  dmap u_dmap;            /* disk map for data segment */
        !           111:        struct  dmap u_smap;            /* disk map for stack segment */
        !           112:        struct  dmap u_cdmap, u_csmap;  /* shadows of u_dmap, u_smap, for
        !           113:                                           use of parent during fork */
        !           114:        time_t  u_outime;               /* user time at last sample */
        !           115:        size_t  u_odsize, u_ossize;     /* for (clumsy) expansion swaps */
        !           116:        int     u_limit[8];             /* see <sys/limit.h> */
        !           117:        int     u_nbadio;               /* # IO operations on hungup streams */
        !           118:        int     u_stack[1];
        !           119: 
        !           120:                                        /*
        !           121:                                         * kernel stack per user
        !           122:                                         * extends from u + UPAGES*512
        !           123:                                         * backward not to reach here
        !           124:                                         */
        !           125: /* SHOULD INSTEAD GROW STACK BACKWARDS ABOVE u. TOWARDS A VIRTUAL HOLE */
        !           126: };
        !           127: 
        !           128: /* u_eosys values */
        !           129: #define        JUSTRETURN      0
        !           130: #define        RESTARTSYS      1
        !           131: #define        SIMULATERTI     2
        !           132: 
        !           133: /* u_error codes */
        !           134: #include <errno.h>
        !           135: 
        !           136: #ifdef KERNEL
        !           137: extern struct user u;
        !           138: extern struct user swaputl;
        !           139: extern struct user forkutl;
        !           140: extern struct user xswaputl;
        !           141: extern struct user xswap2utl;
        !           142: extern struct user pushutl;
        !           143: extern struct user vfutl;
        !           144: extern struct user prusrutl;
        !           145: #endif

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