Notes

/* This table has one slot per process. It contains all the process management
* information for each process. Among other things, it defines the text, data
* and stack segments, uids and gids, and various flags. The kernel and file
* systems have tables that are also indexed by process, with the contents
* of corresponding slots referring to the same process in all three.
*/
#include <limits.h>
#include <timers.h>
#include <signal.h>

#include <sys/cdefs.h>

/* Needs to be included here, for 'ps' etc */
#include "const.h"

EXTERN struct mproc {
char mp_exitstatus; /* storage for status when process exits */
char mp_sigstatus; /* storage for signal # for killed procs */
pid_t mp_pid; /* process id */
endpoint_t mp_endpoint; /* kernel endpoint id */
pid_t mp_procgrp; /* pid of process group (used for signals) */
pid_t mp_wpid; /* pid this process is waiting for */
int mp_parent; /* index of parent process */
int mp_tracer; /* index of tracer process, or NO_TRACER */

/* Child user and system times. Accounting done on child exit. */
clock_t mp_child_utime; /* cumulative user time of children */
clock_t mp_child_stime; /* cumulative sys time of children */

/* Real and effective uids and gids. */
uid_t mp_realuid; /* process' real uid */
uid_t mp_effuid; /* process' effective uid */
gid_t mp_realgid; /* process' real gid */
gid_t mp_effgid; /* process' effective gid */

/* Supplemental groups. */
int mp_ngroups; /* number of supplemental groups */
gid_t mp_sgroups[NGROUPS_MAX];/* process' supplemental groups */

/* Signal handling information. */
sigset_t mp_ignore; /* 1 means ignore the signal, 0 means don't */
sigset_t mp_catch; /* 1 means catch the signal, 0 means don't */
sigset_t mp_sigmask; /* signals to be blocked */
sigset_t mp_sigmask2; /* saved copy of mp_sigmask */
sigset_t mp_sigpending; /* pending signals to be handled */
sigset_t mp_ksigpending; /* bitmap for pending signals from the kernel */
sigset_t mp_sigtrace; /* signals to hand to tracer first */
struct sigaction mp_sigact[_NSIG]; /* as in sigaction(2) */
#ifdef __ACK__
char mp_padding[60]; /* align structure with new libc */
#endif
vir_bytes mp_sigreturn; /* address of C library __sigreturn function */
struct timer mp_timer; /* watchdog timer for alarm(2), setitimer(2) */
clock_t mp_interval[NR_ITIMERS]; /* setitimer(2) repetition intervals */

unsigned mp_flags; /* flag bits */
unsigned mp_trace_flags; /* trace options */
message mp_reply; /* reply message to be sent to one */

/* Process execution frame. Both fields are used by procfs. */
vir_bytes mp_frame_addr; /* ptr to proc's initial stack arguments */
size_t mp_frame_len; /* size of proc's initial stack arguments */

/* Scheduling priority. */
signed int mp_nice; /* nice is PRIO_MIN..PRIO_MAX, standard 0. */

/* User space scheduling */
endpoint_t mp_scheduler; /* scheduler endpoint id */

char mp_name[PROC_NAME_LEN]; /* process name */

int mp_magic; /* sanity check, MP_MAGIC */
} mproc[NR_PROCS];

/* Flag values */
#define IN_USE 0x00001 /* set when 'mproc' slot in use */
#define WAITING 0x00002 /* set by WAIT system call */
#define ZOMBIE 0x00004 /* waiting for parent to issue WAIT call */
#define PAUSED 0x00008 /* set by PAUSE system call */
#define ALARM_ON 0x00010 /* set when SIGALRM timer started */
#define EXITING 0x00020 /* set by EXIT, process is now exiting */
#define TOLD_PARENT 0x00040 /* parent wait() completed, ZOMBIE off */
#define STOPPED 0x00080 /* set if process stopped for tracing */
#define SIGSUSPENDED 0x00100 /* set by SIGSUSPEND system call */
#define REPLY 0x00200 /* set if a reply message is pending */
#define VFS_CALL 0x00400 /* set if waiting for VFS (normal calls) */
#define PM_SIG_PENDING 0x00800 /* process got a signal while waiting for VFS */
#define UNPAUSED 0x01000 /* process is not in a blocking call */
#define PRIV_PROC 0x02000 /* system process, special privileges */
#define PARTIAL_EXEC 0x04000 /* process got a new map but no content */
#define TRACE_EXIT 0x08000 /* tracer is forcing this process to exit */
#define TRACE_ZOMBIE 0x10000 /* waiting for tracer to issue WAIT call */
#define DELAY_CALL 0x20000 /* waiting for call before sending signal */
#define TAINTED 0x40000 /* process is 'tainted' */

#define MP_MAGIC 0xC0FFEE0