917 lines
26 KiB
C
917 lines
26 KiB
C
/* This file contains the main program of the process manager and some related
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* procedures. When MINIX starts up, the kernel runs for a little while,
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* initializing itself and its tasks, and then it runs PM and FS. Both PM
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* and FS initialize themselves as far as they can. PM asks the kernel for
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* all free memory and starts serving requests.
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*
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* The entry points into this file are:
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* main: starts PM running
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* setreply: set the reply to be sent to process making an PM system call
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*/
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#include "pm.h"
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#include <minix/keymap.h>
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/endpoint.h>
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#include <minix/minlib.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/resource.h>
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#include <sys/utsname.h>
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#include <string.h>
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#include "mproc.h"
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#include "param.h"
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#include "../../kernel/const.h"
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#include "../../kernel/config.h"
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#include "../../kernel/type.h"
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#include "../../kernel/proc.h"
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FORWARD _PROTOTYPE( void get_work, (void) );
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FORWARD _PROTOTYPE( void pm_init, (void) );
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FORWARD _PROTOTYPE( int get_nice_value, (int queue) );
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FORWARD _PROTOTYPE( void get_mem_chunks, (struct memory *mem_chunks) );
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FORWARD _PROTOTYPE( void patch_mem_chunks, (struct memory *mem_chunks,
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struct mem_map *map_ptr) );
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FORWARD _PROTOTYPE( void do_x86_vm, (struct memory mem_chunks[NR_MEMS]) );
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FORWARD _PROTOTYPE( void send_work, (void) );
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FORWARD _PROTOTYPE( void handle_fs_reply, (message *m_ptr) );
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#define click_to_round_k(n) \
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((unsigned) ((((unsigned long) (n) << CLICK_SHIFT) + 512) / 1024))
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/*===========================================================================*
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* main *
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*===========================================================================*/
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PUBLIC int main()
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{
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/* Main routine of the process manager. */
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int result, s, proc_nr;
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struct mproc *rmp;
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sigset_t sigset;
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pm_init(); /* initialize process manager tables */
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/* This is PM's main loop- get work and do it, forever and forever. */
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while (TRUE) {
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get_work(); /* wait for an PM system call */
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/* Check for system notifications first. Special cases. */
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switch(call_nr)
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{
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case SYN_ALARM:
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pm_expire_timers(m_in.NOTIFY_TIMESTAMP);
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result = SUSPEND; /* don't reply */
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break;
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case SYS_SIG: /* signals pending */
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sigset = m_in.NOTIFY_ARG;
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if (sigismember(&sigset, SIGKSIG)) {
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(void) ksig_pending();
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}
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result = SUSPEND; /* don't reply */
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break;
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case PM_GET_WORK:
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if (who_e == FS_PROC_NR)
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{
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send_work();
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result= SUSPEND; /* don't reply */
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}
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else
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result= ENOSYS;
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break;
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case PM_EXIT_REPLY:
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case PM_REBOOT_REPLY:
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case PM_EXEC_REPLY:
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case PM_CORE_REPLY:
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case PM_EXIT_REPLY_TR:
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if (who_e == FS_PROC_NR)
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{
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handle_fs_reply(&m_in);
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result= SUSPEND; /* don't reply */
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}
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else
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result= ENOSYS;
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break;
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case ALLOCMEM:
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result= do_allocmem();
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break;
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case FORK_NB:
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result= do_fork_nb();
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break;
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case EXEC_NEWMEM:
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result= exec_newmem();
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break;
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case EXEC_RESTART:
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result= do_execrestart();
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break;
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case PROCSTAT:
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result= do_procstat();
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break;
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case GETPROCNR:
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result= do_getprocnr();
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break;
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default:
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/* Else, if the system call number is valid, perform the
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* call.
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*/
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if ((unsigned) call_nr >= NCALLS) {
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result = ENOSYS;
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} else {
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result = (*call_vec[call_nr])();
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}
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break;
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}
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/* Send the results back to the user to indicate completion. */
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if (result != SUSPEND) setreply(who_p, result);
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swap_in(); /* maybe a process can be swapped in? */
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/* Send out all pending reply messages, including the answer to
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* the call just made above. The processes must not be swapped out.
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*/
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for (proc_nr=0, rmp=mproc; proc_nr < NR_PROCS; proc_nr++, rmp++) {
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/* In the meantime, the process may have been killed by a
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* signal (e.g. if a lethal pending signal was unblocked)
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* without the PM realizing it. If the slot is no longer in
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* use or just a zombie, don't try to reply.
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*/
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if ((rmp->mp_flags & (REPLY | ONSWAP | IN_USE | ZOMBIE)) ==
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(REPLY | IN_USE)) {
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if ((s=send(rmp->mp_endpoint, &rmp->mp_reply)) != OK) {
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printf("PM can't reply to %d (%s)\n",
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rmp->mp_endpoint, rmp->mp_name);
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panic(__FILE__, "PM can't reply", NO_NUM);
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}
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rmp->mp_flags &= ~REPLY;
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}
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}
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}
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return(OK);
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}
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/*===========================================================================*
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* get_work *
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*===========================================================================*/
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PRIVATE void get_work()
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{
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/* Wait for the next message and extract useful information from it. */
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if (receive(ANY, &m_in) != OK)
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panic(__FILE__,"PM receive error", NO_NUM);
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who_e = m_in.m_source; /* who sent the message */
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if(pm_isokendpt(who_e, &who_p) != OK)
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panic(__FILE__, "PM got message from invalid endpoint", who_e);
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call_nr = m_in.m_type; /* system call number */
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/* Process slot of caller. Misuse PM's own process slot if the kernel is
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* calling. This can happen in case of synchronous alarms (CLOCK) or or
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* event like pending kernel signals (SYSTEM).
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*/
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mp = &mproc[who_p < 0 ? PM_PROC_NR : who_p];
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if(who_p >= 0 && mp->mp_endpoint != who_e) {
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panic(__FILE__, "PM endpoint number out of sync with source",
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mp->mp_endpoint);
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}
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}
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/*===========================================================================*
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* setreply *
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*===========================================================================*/
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PUBLIC void setreply(proc_nr, result)
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int proc_nr; /* process to reply to */
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int result; /* result of call (usually OK or error #) */
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{
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/* Fill in a reply message to be sent later to a user process. System calls
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* may occasionally fill in other fields, this is only for the main return
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* value, and for setting the "must send reply" flag.
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*/
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register struct mproc *rmp = &mproc[proc_nr];
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if(proc_nr < 0 || proc_nr >= NR_PROCS)
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panic(__FILE__,"setreply arg out of range", proc_nr);
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rmp->mp_reply.reply_res = result;
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rmp->mp_flags |= REPLY; /* reply pending */
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if (rmp->mp_flags & ONSWAP)
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swap_inqueue(rmp); /* must swap this process back in */
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}
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/*===========================================================================*
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* pm_init *
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*===========================================================================*/
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PRIVATE void pm_init()
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{
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/* Initialize the process manager.
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* Memory use info is collected from the boot monitor, the kernel, and
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* all processes compiled into the system image. Initially this information
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* is put into an array mem_chunks. Elements of mem_chunks are struct memory,
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* and hold base, size pairs in units of clicks. This array is small, there
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* should be no more than 8 chunks. After the array of chunks has been built
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* the contents are used to initialize the hole list. Space for the hole list
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* is reserved as an array with twice as many elements as the maximum number
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* of processes allowed. It is managed as a linked list, and elements of the
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* array are struct hole, which, in addition to storage for a base and size in
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* click units also contain space for a link, a pointer to another element.
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*/
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int s;
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static struct boot_image image[NR_BOOT_PROCS];
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register struct boot_image *ip;
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static char core_sigs[] = { SIGQUIT, SIGILL, SIGTRAP, SIGABRT,
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SIGEMT, SIGFPE, SIGUSR1, SIGSEGV, SIGUSR2 };
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static char ign_sigs[] = { SIGCHLD, SIGWINCH, SIGCONT };
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static char mess_sigs[] = { SIGTERM, SIGHUP, SIGABRT, SIGQUIT };
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register struct mproc *rmp;
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register int i;
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register char *sig_ptr;
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phys_clicks total_clicks, minix_clicks, free_clicks;
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message mess;
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struct mem_map mem_map[NR_LOCAL_SEGS];
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struct memory mem_chunks[NR_MEMS];
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/* Initialize process table, including timers. */
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for (rmp=&mproc[0]; rmp<&mproc[NR_PROCS]; rmp++) {
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tmr_inittimer(&rmp->mp_timer);
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rmp->mp_fs_call= PM_IDLE;
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rmp->mp_fs_call2= PM_IDLE;
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}
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/* Build the set of signals which cause core dumps, and the set of signals
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* that are by default ignored.
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*/
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sigemptyset(&core_sset);
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for (sig_ptr = core_sigs; sig_ptr < core_sigs+sizeof(core_sigs); sig_ptr++)
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sigaddset(&core_sset, *sig_ptr);
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sigemptyset(&ign_sset);
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for (sig_ptr = ign_sigs; sig_ptr < ign_sigs+sizeof(ign_sigs); sig_ptr++)
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sigaddset(&ign_sset, *sig_ptr);
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/* Obtain a copy of the boot monitor parameters and the kernel info struct.
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* Parse the list of free memory chunks. This list is what the boot monitor
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* reported, but it must be corrected for the kernel and system processes.
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*/
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if ((s=sys_getmonparams(monitor_params, sizeof(monitor_params))) != OK)
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panic(__FILE__,"get monitor params failed",s);
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get_mem_chunks(mem_chunks);
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if ((s=sys_getkinfo(&kinfo)) != OK)
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panic(__FILE__,"get kernel info failed",s);
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/* Get the memory map of the kernel to see how much memory it uses. */
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if ((s=get_mem_map(SYSTASK, mem_map)) != OK)
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panic(__FILE__,"couldn't get memory map of SYSTASK",s);
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minix_clicks = (mem_map[S].mem_phys+mem_map[S].mem_len)-mem_map[T].mem_phys;
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patch_mem_chunks(mem_chunks, mem_map);
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/* Initialize PM's process table. Request a copy of the system image table
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* that is defined at the kernel level to see which slots to fill in.
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*/
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if (OK != (s=sys_getimage(image)))
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panic(__FILE__,"couldn't get image table: %d\n", s);
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procs_in_use = 0; /* start populating table */
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for (ip = &image[0]; ip < &image[NR_BOOT_PROCS]; ip++) {
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if (ip->proc_nr >= 0) { /* task have negative nrs */
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procs_in_use += 1; /* found user process */
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/* Set process details found in the image table. */
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rmp = &mproc[ip->proc_nr];
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strncpy(rmp->mp_name, ip->proc_name, PROC_NAME_LEN);
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rmp->mp_parent = RS_PROC_NR;
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rmp->mp_nice = get_nice_value(ip->priority);
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sigemptyset(&rmp->mp_sig2mess);
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sigemptyset(&rmp->mp_ignore);
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sigemptyset(&rmp->mp_sigmask);
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sigemptyset(&rmp->mp_catch);
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if (ip->proc_nr == INIT_PROC_NR) { /* user process */
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rmp->mp_procgrp = rmp->mp_pid = INIT_PID;
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rmp->mp_flags |= IN_USE;
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}
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else { /* system process */
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rmp->mp_pid = get_free_pid();
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rmp->mp_flags |= IN_USE | DONT_SWAP | PRIV_PROC;
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for (sig_ptr = mess_sigs;
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sig_ptr < mess_sigs+sizeof(mess_sigs);
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sig_ptr++)
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sigaddset(&rmp->mp_sig2mess, *sig_ptr);
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}
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/* Get kernel endpoint identifier. */
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rmp->mp_endpoint = ip->endpoint;
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/* Get memory map for this process from the kernel. */
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if ((s=get_mem_map(ip->proc_nr, rmp->mp_seg)) != OK)
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panic(__FILE__,"couldn't get process entry",s);
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if (rmp->mp_seg[T].mem_len != 0) rmp->mp_flags |= SEPARATE;
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minix_clicks += rmp->mp_seg[S].mem_phys +
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rmp->mp_seg[S].mem_len - rmp->mp_seg[T].mem_phys;
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patch_mem_chunks(mem_chunks, rmp->mp_seg);
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/* Tell FS about this system process. */
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mess.PR_SLOT = ip->proc_nr;
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mess.PR_PID = rmp->mp_pid;
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mess.PR_ENDPT = rmp->mp_endpoint;
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if (OK != (s=send(FS_PROC_NR, &mess)))
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panic(__FILE__,"can't sync up with FS", s);
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}
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}
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/* Override some details. INIT, PM, FS and RS are somewhat special. */
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mproc[PM_PROC_NR].mp_pid = PM_PID; /* PM has magic pid */
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mproc[RS_PROC_NR].mp_parent = INIT_PROC_NR; /* INIT is root */
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sigfillset(&mproc[PM_PROC_NR].mp_ignore); /* guard against signals */
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/* Tell FS that no more system processes follow and synchronize. */
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mess.PR_ENDPT = NONE;
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if (sendrec(FS_PROC_NR, &mess) != OK || mess.m_type != OK)
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panic(__FILE__,"can't sync up with FS", NO_NUM);
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#if ENABLE_BOOTDEV
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/* Possibly we must correct the memory chunks for the boot device. */
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if (kinfo.bootdev_size > 0) {
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mem_map[T].mem_phys = kinfo.bootdev_base >> CLICK_SHIFT;
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mem_map[T].mem_len = 0;
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mem_map[D].mem_len = (kinfo.bootdev_size+CLICK_SIZE-1) >> CLICK_SHIFT;
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patch_mem_chunks(mem_chunks, mem_map);
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}
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#endif /* ENABLE_BOOTDEV */
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/* Withhold some memory from x86 VM */
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do_x86_vm(mem_chunks);
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/* Initialize tables to all physical memory and print memory information. */
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printf("Physical memory:");
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mem_init(mem_chunks, &free_clicks);
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total_clicks = minix_clicks + free_clicks;
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printf(" total %u KB,", click_to_round_k(total_clicks));
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printf(" system %u KB,", click_to_round_k(minix_clicks));
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printf(" free %u KB.\n", click_to_round_k(free_clicks));
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#if (CHIP == INTEL)
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uts_val.machine[0] = 'i';
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strcpy(uts_val.machine + 1, itoa(getprocessor()));
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#endif
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}
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/*===========================================================================*
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* get_nice_value *
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*===========================================================================*/
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PRIVATE int get_nice_value(queue)
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int queue; /* store mem chunks here */
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{
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/* Processes in the boot image have a priority assigned. The PM doesn't know
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* about priorities, but uses 'nice' values instead. The priority is between
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* MIN_USER_Q and MAX_USER_Q. We have to scale between PRIO_MIN and PRIO_MAX.
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*/
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int nice_val = (queue - USER_Q) * (PRIO_MAX-PRIO_MIN+1) /
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(MIN_USER_Q-MAX_USER_Q+1);
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if (nice_val > PRIO_MAX) nice_val = PRIO_MAX; /* shouldn't happen */
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if (nice_val < PRIO_MIN) nice_val = PRIO_MIN; /* shouldn't happen */
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return nice_val;
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}
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#if _WORD_SIZE == 2
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/* In real mode only 1M can be addressed, and in 16-bit protected we can go
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* no further than we can count in clicks. (The 286 is further limited by
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* its 24 bit address bus, but we can assume in that case that no more than
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* 16M memory is reported by the BIOS.)
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*/
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#define MAX_REAL 0x00100000L
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#define MAX_16BIT (0xFFF0L << CLICK_SHIFT)
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#endif
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/*===========================================================================*
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* get_mem_chunks *
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*===========================================================================*/
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PRIVATE void get_mem_chunks(mem_chunks)
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struct memory *mem_chunks; /* store mem chunks here */
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{
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/* Initialize the free memory list from the 'memory' boot variable. Translate
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* the byte offsets and sizes in this list to clicks, properly truncated. Also
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* make sure that we don't exceed the maximum address space of the 286 or the
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* 8086, i.e. when running in 16-bit protected mode or real mode.
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*/
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long base, size, limit;
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char *s, *end; /* use to parse boot variable */
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int i, done = 0;
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struct memory *memp;
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#if _WORD_SIZE == 2
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unsigned long max_address;
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struct machine machine;
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if (OK != (i=sys_getmachine(&machine)))
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panic(__FILE__, "sys_getmachine failed", i);
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#endif
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/* Initialize everything to zero. */
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for (i = 0; i < NR_MEMS; i++) {
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memp = &mem_chunks[i]; /* next mem chunk is stored here */
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memp->base = memp->size = 0;
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}
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/* The available memory is determined by MINIX' boot loader as a list of
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* (base:size)-pairs in boothead.s. The 'memory' boot variable is set in
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* in boot.s. The format is "b0:s0,b1:s1,b2:s2", where b0:s0 is low mem,
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* b1:s1 is mem between 1M and 16M, b2:s2 is mem above 16M. Pairs b1:s1
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* and b2:s2 are combined if the memory is adjacent.
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*/
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s = find_param("memory"); /* get memory boot variable */
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for (i = 0; i < NR_MEMS && !done; i++) {
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memp = &mem_chunks[i]; /* next mem chunk is stored here */
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base = size = 0; /* initialize next base:size pair */
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if (*s != 0) { /* get fresh data, unless at end */
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/* Read fresh base and expect colon as next char. */
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base = strtoul(s, &end, 0x10); /* get number */
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if (end != s && *end == ':') s = ++end; /* skip ':' */
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else *s=0; /* terminate, should not happen */
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/* Read fresh size and expect comma or assume end. */
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size = strtoul(s, &end, 0x10); /* get number */
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if (end != s && *end == ',') s = ++end; /* skip ',' */
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else done = 1;
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}
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limit = base + size;
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#if _WORD_SIZE == 2
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max_address = machine.protected ? MAX_16BIT : MAX_REAL;
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if (limit > max_address) limit = max_address;
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#endif
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base = (base + CLICK_SIZE-1) & ~(long)(CLICK_SIZE-1);
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limit &= ~(long)(CLICK_SIZE-1);
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if (limit <= base) continue;
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memp->base = base >> CLICK_SHIFT;
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memp->size = (limit - base) >> CLICK_SHIFT;
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}
|
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}
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/*===========================================================================*
|
|
* patch_mem_chunks *
|
|
*===========================================================================*/
|
|
PRIVATE void patch_mem_chunks(mem_chunks, map_ptr)
|
|
struct memory *mem_chunks; /* store mem chunks here */
|
|
struct mem_map *map_ptr; /* memory to remove */
|
|
{
|
|
/* Remove server memory from the free memory list. The boot monitor
|
|
* promises to put processes at the start of memory chunks. The
|
|
* tasks all use same base address, so only the first task changes
|
|
* the memory lists. The servers and init have their own memory
|
|
* spaces and their memory will be removed from the list.
|
|
*/
|
|
struct memory *memp;
|
|
for (memp = mem_chunks; memp < &mem_chunks[NR_MEMS]; memp++) {
|
|
if (memp->base == map_ptr[T].mem_phys) {
|
|
memp->base += map_ptr[T].mem_len + map_ptr[S].mem_vir;
|
|
memp->size -= map_ptr[T].mem_len + map_ptr[S].mem_vir;
|
|
break;
|
|
}
|
|
}
|
|
if (memp >= &mem_chunks[NR_MEMS])
|
|
{
|
|
panic(__FILE__,"patch_mem_chunks: can't find map in mem_chunks, start",
|
|
map_ptr[T].mem_phys);
|
|
}
|
|
}
|
|
|
|
#define PAGE_SIZE 4096
|
|
#define PAGE_TABLE_COVER (1024*PAGE_SIZE)
|
|
/*=========================================================================*
|
|
* do_x86_vm *
|
|
*=========================================================================*/
|
|
PRIVATE void do_x86_vm(mem_chunks)
|
|
struct memory mem_chunks[NR_MEMS];
|
|
{
|
|
phys_bytes high, bytes;
|
|
phys_clicks clicks, base_click;
|
|
unsigned pages;
|
|
int i, r;
|
|
|
|
/* Compute the highest memory location */
|
|
high= 0;
|
|
for (i= 0; i<NR_MEMS; i++)
|
|
{
|
|
if (mem_chunks[i].size == 0)
|
|
continue;
|
|
if (mem_chunks[i].base + mem_chunks[i].size > high)
|
|
high= mem_chunks[i].base + mem_chunks[i].size;
|
|
}
|
|
|
|
high <<= CLICK_SHIFT;
|
|
#if VERBOSE_VM
|
|
printf("do_x86_vm: found high 0x%x\n", high);
|
|
#endif
|
|
|
|
/* The number of pages we need is one for the page directory, enough
|
|
* page tables to cover the memory, and one page for alignement.
|
|
*/
|
|
pages= 1 + (high + PAGE_TABLE_COVER-1)/PAGE_TABLE_COVER + 1;
|
|
bytes= pages*PAGE_SIZE;
|
|
clicks= (bytes + CLICK_SIZE-1) >> CLICK_SHIFT;
|
|
|
|
#if VERBOSE_VM
|
|
printf("do_x86_vm: need %d pages\n", pages);
|
|
printf("do_x86_vm: need %d bytes\n", bytes);
|
|
printf("do_x86_vm: need %d clicks\n", clicks);
|
|
#endif
|
|
|
|
for (i= 0; i<NR_MEMS; i++)
|
|
{
|
|
if (mem_chunks[i].size <= clicks)
|
|
continue;
|
|
break;
|
|
}
|
|
if (i >= NR_MEMS)
|
|
panic("PM", "not enough memory for VM page tables?", NO_NUM);
|
|
base_click= mem_chunks[i].base;
|
|
mem_chunks[i].base += clicks;
|
|
mem_chunks[i].size -= clicks;
|
|
|
|
#if VERBOSE_VM
|
|
printf("do_x86_vm: using 0x%x clicks @ 0x%x\n", clicks, base_click);
|
|
#endif
|
|
r= sys_vm_setbuf(base_click << CLICK_SHIFT, clicks << CLICK_SHIFT,
|
|
high);
|
|
if (r != 0)
|
|
printf("do_x86_vm: sys_vm_setbuf failed: %d\n", r);
|
|
}
|
|
|
|
/*=========================================================================*
|
|
* send_work *
|
|
*=========================================================================*/
|
|
PRIVATE void send_work()
|
|
{
|
|
int r, call;
|
|
struct mproc *rmp;
|
|
message m;
|
|
|
|
m.m_type= PM_IDLE;
|
|
for (rmp= mproc; rmp < &mproc[NR_PROCS]; rmp++)
|
|
{
|
|
call= rmp->mp_fs_call;
|
|
if (call == PM_IDLE)
|
|
call= rmp->mp_fs_call2;
|
|
if (call == PM_IDLE)
|
|
continue;
|
|
switch(call)
|
|
{
|
|
case PM_STIME:
|
|
m.m_type= call;
|
|
m.PM_STIME_TIME= boottime;
|
|
|
|
/* FS does not reply */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
/* Wakeup the original caller */
|
|
setreply(rmp-mproc, OK);
|
|
break;
|
|
|
|
case PM_SETSID:
|
|
m.m_type= call;
|
|
m.PM_SETSID_PROC= rmp->mp_endpoint;
|
|
|
|
/* FS does not reply */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
/* Wakeup the original caller */
|
|
setreply(rmp-mproc, rmp->mp_procgrp);
|
|
break;
|
|
|
|
case PM_SETGID:
|
|
m.m_type= call;
|
|
m.PM_SETGID_PROC= rmp->mp_endpoint;
|
|
m.PM_SETGID_EGID= rmp->mp_effgid;
|
|
m.PM_SETGID_RGID= rmp->mp_realgid;
|
|
|
|
/* FS does not reply */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
/* Wakeup the original caller */
|
|
setreply(rmp-mproc, OK);
|
|
break;
|
|
|
|
case PM_SETUID:
|
|
m.m_type= call;
|
|
m.PM_SETUID_PROC= rmp->mp_endpoint;
|
|
m.PM_SETUID_EGID= rmp->mp_effuid;
|
|
m.PM_SETUID_RGID= rmp->mp_realuid;
|
|
|
|
/* FS does not reply */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
/* Wakeup the original caller */
|
|
setreply(rmp-mproc, OK);
|
|
break;
|
|
|
|
case PM_FORK:
|
|
{
|
|
int parent_e, parent_p;
|
|
struct mproc *parent_mp;
|
|
|
|
parent_p = rmp->mp_parent;
|
|
parent_mp = &mproc[parent_p];
|
|
|
|
m.m_type= call;
|
|
m.PM_FORK_PPROC= parent_mp->mp_endpoint;
|
|
m.PM_FORK_CPROC= rmp->mp_endpoint;
|
|
m.PM_FORK_CPID= rmp->mp_pid;
|
|
|
|
/* FS does not reply */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
/* Wakeup the newly created process */
|
|
setreply(rmp-mproc, OK);
|
|
|
|
/* Wakeup the parent */
|
|
setreply(parent_mp-mproc, rmp->mp_pid);
|
|
break;
|
|
}
|
|
|
|
case PM_EXIT:
|
|
case PM_EXIT_TR:
|
|
m.m_type= call;
|
|
m.PM_EXIT_PROC= rmp->mp_endpoint;
|
|
|
|
/* Mark the process as busy */
|
|
rmp->mp_fs_call= PM_BUSY;
|
|
|
|
break;
|
|
|
|
case PM_UNPAUSE:
|
|
m.m_type= call;
|
|
m.PM_UNPAUSE_PROC= rmp->mp_endpoint;
|
|
|
|
/* FS does not reply */
|
|
rmp->mp_fs_call2= PM_IDLE;
|
|
|
|
/* Ask the kernel to deliver the signal */
|
|
r= sys_sigsend(rmp->mp_endpoint,
|
|
&rmp->mp_sigmsg);
|
|
if (r != OK)
|
|
panic(__FILE__,"sys_sigsend failed",r);
|
|
|
|
break;
|
|
|
|
case PM_UNPAUSE_TR:
|
|
m.m_type= call;
|
|
m.PM_UNPAUSE_PROC= rmp->mp_endpoint;
|
|
|
|
/* FS does not reply */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
break;
|
|
|
|
case PM_EXEC:
|
|
m.m_type= call;
|
|
m.PM_EXEC_PROC= rmp->mp_endpoint;
|
|
m.PM_EXEC_PATH= rmp->mp_exec_path;
|
|
m.PM_EXEC_PATH_LEN= rmp->mp_exec_path_len;
|
|
m.PM_EXEC_FRAME= rmp->mp_exec_frame;
|
|
m.PM_EXEC_FRAME_LEN= rmp->mp_exec_frame_len;
|
|
|
|
/* Mark the process as busy */
|
|
rmp->mp_fs_call= PM_BUSY;
|
|
|
|
break;
|
|
|
|
case PM_FORK_NB:
|
|
{
|
|
int parent_e, parent_p;
|
|
struct mproc *parent_mp;
|
|
|
|
parent_p = rmp->mp_parent;
|
|
parent_mp = &mproc[parent_p];
|
|
|
|
m.m_type= PM_FORK;
|
|
m.PM_FORK_PPROC= parent_mp->mp_endpoint;
|
|
m.PM_FORK_CPROC= rmp->mp_endpoint;
|
|
m.PM_FORK_CPID= rmp->mp_pid;
|
|
|
|
/* FS does not reply */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
break;
|
|
}
|
|
|
|
case PM_DUMPCORE:
|
|
m.m_type= call;
|
|
m.PM_CORE_PROC= rmp->mp_endpoint;
|
|
m.PM_CORE_SEGPTR= (char *)rmp->mp_seg;
|
|
|
|
/* Mark the process as busy */
|
|
rmp->mp_fs_call= PM_BUSY;
|
|
|
|
break;
|
|
|
|
default:
|
|
printf("send_work: should report call 0x%x to FS\n",
|
|
call);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
if (m.m_type != PM_IDLE)
|
|
{
|
|
if (rmp->mp_fs_call == PM_IDLE &&
|
|
rmp->mp_fs_call2 == PM_IDLE &&
|
|
(rmp->mp_flags & PM_SIG_PENDING))
|
|
{
|
|
rmp->mp_flags &= ~PM_SIG_PENDING;
|
|
check_pending(rmp);
|
|
if (!(rmp->mp_flags & PM_SIG_PENDING))
|
|
{
|
|
/* Allow the process to be scheduled */
|
|
sys_nice(rmp->mp_endpoint, rmp->mp_nice);
|
|
}
|
|
}
|
|
}
|
|
else if (report_reboot)
|
|
{
|
|
m.m_type= PM_REBOOT;
|
|
report_reboot= FALSE;
|
|
}
|
|
r= send(FS_PROC_NR, &m);
|
|
if (r != OK) panic("pm", "send_work: send failed", r);
|
|
}
|
|
|
|
PRIVATE void handle_fs_reply(m_ptr)
|
|
message *m_ptr;
|
|
{
|
|
int r, proc_e, proc_n;
|
|
struct mproc *rmp;
|
|
|
|
switch(m_ptr->m_type)
|
|
{
|
|
case PM_EXIT_REPLY:
|
|
case PM_EXIT_REPLY_TR:
|
|
proc_e= m_ptr->PM_EXIT_PROC;
|
|
if (pm_isokendpt(proc_e, &proc_n) != OK)
|
|
{
|
|
panic(__FILE__,
|
|
"PM_EXIT_REPLY: got bad endpoint from FS",
|
|
proc_e);
|
|
}
|
|
rmp= &mproc[proc_n];
|
|
|
|
/* Call is finished */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
if (!(rmp->mp_flags & PRIV_PROC))
|
|
{
|
|
/* destroy the (user) process */
|
|
if((r=sys_exit(proc_e)) != OK)
|
|
{
|
|
panic(__FILE__,
|
|
"PM_EXIT_REPLY: sys_exit failed", r);
|
|
}
|
|
}
|
|
|
|
/* Release the memory occupied by the child. */
|
|
if (find_share(rmp, rmp->mp_ino, rmp->mp_dev,
|
|
rmp->mp_ctime) == NULL) {
|
|
/* No other process shares the text segment,
|
|
* so free it.
|
|
*/
|
|
free_mem(rmp->mp_seg[T].mem_phys,
|
|
rmp->mp_seg[T].mem_len);
|
|
}
|
|
/* Free the data and stack segments. */
|
|
free_mem(rmp->mp_seg[D].mem_phys, rmp->mp_seg[S].mem_vir +
|
|
rmp->mp_seg[S].mem_len - rmp->mp_seg[D].mem_vir);
|
|
|
|
if (m_ptr->m_type == PM_EXIT_REPLY_TR &&
|
|
rmp->mp_parent != INIT_PROC_NR)
|
|
{
|
|
/* Wake up the parent */
|
|
mproc[rmp->mp_parent].mp_reply.reply_trace = 0;
|
|
setreply(rmp->mp_parent, OK);
|
|
}
|
|
|
|
/* Clean up if the parent has collected the exit
|
|
* status
|
|
*/
|
|
if (!(rmp->mp_flags & ZOMBIE))
|
|
real_cleanup(rmp);
|
|
|
|
break;
|
|
|
|
case PM_REBOOT_REPLY:
|
|
{
|
|
vir_bytes code_addr;
|
|
size_t code_size;
|
|
|
|
/* Ask the kernel to abort. All system services, including
|
|
* the PM, will get a HARD_STOP notification. Await the
|
|
* notification in the main loop.
|
|
*/
|
|
code_addr = (vir_bytes) monitor_code;
|
|
code_size = strlen(monitor_code) + 1;
|
|
sys_abort(abort_flag, PM_PROC_NR, code_addr, code_size);
|
|
break;
|
|
}
|
|
|
|
case PM_EXEC_REPLY:
|
|
proc_e= m_ptr->PM_EXEC_PROC;
|
|
if (pm_isokendpt(proc_e, &proc_n) != OK)
|
|
{
|
|
panic(__FILE__,
|
|
"PM_EXIT_REPLY: got bad endpoint from FS",
|
|
proc_e);
|
|
}
|
|
rmp= &mproc[proc_n];
|
|
|
|
/* Call is finished */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
exec_restart(rmp, m_ptr->PM_EXEC_STATUS);
|
|
|
|
if (rmp->mp_flags & PM_SIG_PENDING)
|
|
{
|
|
printf("handle_fs_reply: restarting signals\n");
|
|
rmp->mp_flags &= ~PM_SIG_PENDING;
|
|
check_pending(rmp);
|
|
if (!(rmp->mp_flags & PM_SIG_PENDING))
|
|
{
|
|
printf("handle_fs_reply: calling sys_nice\n");
|
|
/* Allow the process to be scheduled */
|
|
sys_nice(rmp->mp_endpoint, rmp->mp_nice);
|
|
}
|
|
else
|
|
printf("handle_fs_reply: more signals\n");
|
|
}
|
|
break;
|
|
|
|
case PM_CORE_REPLY:
|
|
{
|
|
int parent_waiting, right_child;
|
|
pid_t pidarg;
|
|
struct mproc *p_mp;
|
|
|
|
proc_e= m_ptr->PM_CORE_PROC;
|
|
if (pm_isokendpt(proc_e, &proc_n) != OK)
|
|
{
|
|
panic(__FILE__,
|
|
"PM_EXIT_REPLY: got bad endpoint from FS",
|
|
proc_e);
|
|
}
|
|
rmp= &mproc[proc_n];
|
|
|
|
if (m_ptr->PM_CORE_STATUS == OK)
|
|
rmp->mp_sigstatus |= DUMPED;
|
|
|
|
/* Call is finished */
|
|
rmp->mp_fs_call= PM_IDLE;
|
|
|
|
p_mp = &mproc[rmp->mp_parent]; /* process' parent */
|
|
pidarg = p_mp->mp_wpid; /* who's being waited for? */
|
|
parent_waiting = p_mp->mp_flags & WAITING;
|
|
right_child = /* child meets one of the 3 tests? */
|
|
(pidarg == -1 || pidarg == rmp->mp_pid ||
|
|
-pidarg == rmp->mp_procgrp);
|
|
|
|
if (parent_waiting && right_child) {
|
|
tell_parent(rmp); /* tell parent */
|
|
} else {
|
|
/* parent not waiting, zombify child */
|
|
rmp->mp_flags &= (IN_USE|PRIV_PROC);
|
|
rmp->mp_flags |= ZOMBIE;
|
|
/* send parent a "child died" signal */
|
|
sig_proc(p_mp, SIGCHLD);
|
|
}
|
|
|
|
if (!(rmp->mp_flags & PRIV_PROC))
|
|
{
|
|
/* destroy the (user) process */
|
|
if((r=sys_exit(proc_e)) != OK)
|
|
{
|
|
panic(__FILE__,
|
|
"PM_CORE_REPLY: sys_exit failed", r);
|
|
}
|
|
}
|
|
|
|
/* Release the memory occupied by the child. */
|
|
if (find_share(rmp, rmp->mp_ino, rmp->mp_dev,
|
|
rmp->mp_ctime) == NULL) {
|
|
/* No other process shares the text segment,
|
|
* so free it.
|
|
*/
|
|
free_mem(rmp->mp_seg[T].mem_phys,
|
|
rmp->mp_seg[T].mem_len);
|
|
}
|
|
/* Free the data and stack segments. */
|
|
free_mem(rmp->mp_seg[D].mem_phys, rmp->mp_seg[S].mem_vir +
|
|
rmp->mp_seg[S].mem_len - rmp->mp_seg[D].mem_vir);
|
|
|
|
/* Clean up if the parent has collected the exit
|
|
* status
|
|
*/
|
|
if (!(rmp->mp_flags & ZOMBIE))
|
|
real_cleanup(rmp);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
panic(__FILE__, "handle_fs_reply: unknown reply type",
|
|
m_ptr->m_type);
|
|
break;
|
|
}
|
|
|
|
}
|
|
|