63 lines
2.9 KiB
C
63 lines
2.9 KiB
C
/* This table has one slot per process. It contains all the memory management
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* information for each process. Among other things, it defines the text, data
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* and stack segments, uids and gids, and various flags. The kernel and file
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* systems have tables that are also indexed by process, with the contents
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* of corresponding slots referring to the same process in all three.
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*/
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EXTERN struct mproc {
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struct mem_map mp_seg[NR_LOCAL_SEGS]; /* points to text, data, stack */
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char mp_exitstatus; /* storage for status when process exits */
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char mp_sigstatus; /* storage for signal # for killed procs */
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pid_t mp_pid; /* process id */
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pid_t mp_procgrp; /* pid of process group (used for signals) */
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pid_t mp_wpid; /* pid this process is waiting for */
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int mp_parent; /* index of parent process */
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/* Real and effective uids and gids. */
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uid_t mp_realuid; /* process' real uid */
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uid_t mp_effuid; /* process' effective uid */
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gid_t mp_realgid; /* process' real gid */
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gid_t mp_effgid; /* process' effective gid */
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/* File identification for sharing. */
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ino_t mp_ino; /* inode number of file */
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dev_t mp_dev; /* device number of file system */
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time_t mp_ctime; /* inode changed time */
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/* Signal handling information. */
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sigset_t mp_ignore; /* 1 means ignore the signal, 0 means don't */
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sigset_t mp_catch; /* 1 means catch the signal, 0 means don't */
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sigset_t mp_sigmask; /* signals to be blocked */
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sigset_t mp_sigmask2; /* saved copy of mp_sigmask */
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sigset_t mp_sigpending; /* signals being blocked */
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struct sigaction mp_sigact[_NSIG + 1]; /* as in sigaction(2) */
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vir_bytes mp_sigreturn; /* address of C library __sigreturn function */
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/* Backwards compatibility for signals. */
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sighandler_t mp_func; /* all sigs vectored to a single user fcn */
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unsigned mp_flags; /* flag bits */
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vir_bytes mp_procargs; /* ptr to proc's initial stack arguments */
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struct mproc *mp_swapq; /* queue of procs waiting to be swapped in */
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message mp_reply; /* reply message to be sent to one */
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char mp_name[PROC_NAME_LEN]; /* process name */
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} mproc[NR_PROCS];
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/* Flag values */
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#define IN_USE 0x001 /* set when 'mproc' slot in use */
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#define WAITING 0x002 /* set by WAIT system call */
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#define ZOMBIE 0x004 /* set by EXIT, cleared by WAIT */
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#define PAUSED 0x008 /* set by PAUSE system call */
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#define ALARM_ON 0x010 /* set when SIGALRM timer started */
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#define SEPARATE 0x020 /* set if file is separate I & D space */
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#define TRACED 0x040 /* set if process is to be traced */
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#define STOPPED 0x080 /* set if process stopped for tracing */
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#define SIGSUSPENDED 0x100 /* set by SIGSUSPEND system call */
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#define REPLY 0x200 /* set if a reply message is pending */
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#define ONSWAP 0x400 /* set if data segment is swapped out */
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#define SWAPIN 0x800 /* set if on the "swap this in" queue */
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#define NIL_MPROC ((struct mproc *) 0)
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