cb176df60f
UPDATING INFO:
20100317:
/usr/src/etc/system.conf updated to ignore default kernel calls: copy
it (or merge it) to /etc/system.conf.
The hello driver (/dev/hello) added to the distribution:
# cd /usr/src/commands/scripts && make clean install
# cd /dev && MAKEDEV hello
KERNEL CHANGES:
- Generic signal handling support. The kernel no longer assumes PM as a signal
manager for every process. The signal manager of a given process can now be
specified in its privilege slot. When a signal has to be delivered, the kernel
performs the lookup and forwards the signal to the appropriate signal manager.
PM is the default signal manager for user processes, RS is the default signal
manager for system processes. To enable ptrace()ing for system processes, it
is sufficient to change the default signal manager to PM. This will temporarily
disable crash recovery, though.
- sys_exit() is now split into sys_exit() (i.e. exit() for system processes,
which generates a self-termination signal), and sys_clear() (i.e. used by PM
to ask the kernel to clear a process slot when a process exits).
- Added a new kernel call (i.e. sys_update()) to swap two process slots and
implement live update.
PM CHANGES:
- Posix signal handling is no longer allowed for system processes. System
signals are split into two fixed categories: termination and non-termination
signals. When a non-termination signaled is processed, PM transforms the signal
into an IPC message and delivers the message to the system process. When a
termination signal is processed, PM terminates the process.
- PM no longer assumes itself as the signal manager for system processes. It now
makes sure that every system signal goes through the kernel before being
actually processes. The kernel will then dispatch the signal to the appropriate
signal manager which may or may not be PM.
SYSLIB CHANGES:
- Simplified SEF init and LU callbacks.
- Added additional predefined SEF callbacks to debug crash recovery and
live update.
- Fixed a temporary ack in the SEF init protocol. SEF init reply is now
completely synchronous.
- Added SEF signal event type to provide a uniform interface for system
processes to deal with signals. A sef_cb_signal_handler() callback is
available for system processes to handle every received signal. A
sef_cb_signal_manager() callback is used by signal managers to process
system signals on behalf of the kernel.
- Fixed a few bugs with memory mapping and DS.
VM CHANGES:
- Page faults and memory requests coming from the kernel are now implemented
using signals.
- Added a new VM call to swap two process slots and implement live update.
- The call is used by RS at update time and in turn invokes the kernel call
sys_update().
RS CHANGES:
- RS has been reworked with a better functional decomposition.
- Better kernel call masks. com.h now defines the set of very basic kernel calls
every system service is allowed to use. This makes system.conf simpler and
easier to maintain. In addition, this guarantees a higher level of isolation
for system libraries that use one or more kernel calls internally (e.g. printf).
- RS is the default signal manager for system processes. By default, RS
intercepts every signal delivered to every system process. This makes crash
recovery possible before bringing PM and friends in the loop.
- RS now supports fast rollback when something goes wrong while initializing
the new version during a live update.
- Live update is now implemented by keeping the two versions side-by-side and
swapping the process slots when the old version is ready to update.
- Crash recovery is now implemented by keeping the two versions side-by-side
and cleaning up the old version only when the recovery process is complete.
DS CHANGES:
- Fixed a bug when the process doing ds_publish() or ds_delete() is not known
by DS.
- Fixed the completely broken support for strings. String publishing is now
implemented in the system library and simply wraps publishing of memory ranges.
Ideally, we should adopt a similar approach for other data types as well.
- Test suite fixed.
DRIVER CHANGES:
- The hello driver has been added to the Minix distribution to demonstrate basic
live update and crash recovery functionalities.
- Other drivers have been adapted to conform the new SEF interface.
106 lines
3.5 KiB
C
106 lines
3.5 KiB
C
/* Function prototypes. */
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struct mproc;
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struct stat;
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struct mem_map;
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struct memory;
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#include <timers.h>
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/* alarm.c */
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_PROTOTYPE( int do_alarm, (void) );
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_PROTOTYPE( int do_itimer, (void) );
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_PROTOTYPE( void set_alarm, (struct mproc *rmp, clock_t ticks) );
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_PROTOTYPE( void check_vtimer, (int proc_nr, int sig) );
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/* break.c */
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_PROTOTYPE( int do_brk, (void) );
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/* dma.c */
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_PROTOTYPE( int do_adddma, (void) );
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_PROTOTYPE( int do_deldma, (void) );
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_PROTOTYPE( int do_getdma, (void) );
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/* exec.c */
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_PROTOTYPE( int do_exec, (void) );
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_PROTOTYPE( int do_exec_newmem, (void) );
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_PROTOTYPE( int do_execrestart, (void) );
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_PROTOTYPE( void exec_restart, (struct mproc *rmp, int result) );
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/* forkexit.c */
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_PROTOTYPE( int do_fork, (void) );
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_PROTOTYPE( int do_srv_fork, (void) );
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_PROTOTYPE( int do_exit, (void) );
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_PROTOTYPE( void exit_proc, (struct mproc *rmp, int exit_status,
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int dump_core) );
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_PROTOTYPE( void exit_restart, (struct mproc *rmp, int dump_core) );
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_PROTOTYPE( int do_waitpid, (void) );
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_PROTOTYPE( int wait_test, (struct mproc *rmp, struct mproc *child) );
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/* getset.c */
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_PROTOTYPE( int do_get, (void) );
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_PROTOTYPE( int do_set, (void) );
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/* main.c */
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_PROTOTYPE( int main, (void) );
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_PROTOTYPE( void setreply, (int proc_nr, int result) );
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/* mcontext.c */
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_PROTOTYPE( int do_getmcontext, (void) );
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_PROTOTYPE( int do_setmcontext, (void) );
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/* misc.c */
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_PROTOTYPE( int do_reboot, (void) );
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_PROTOTYPE( int do_procstat, (void) );
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_PROTOTYPE( int do_sysuname, (void) );
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_PROTOTYPE( int do_getsysinfo, (void) );
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_PROTOTYPE( int do_getsysinfo_up, (void) );
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_PROTOTYPE( int do_getprocnr, (void) );
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_PROTOTYPE( int do_getepinfo, (void) );
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_PROTOTYPE( int do_svrctl, (void) );
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_PROTOTYPE( int do_getsetpriority, (void) );
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/* profile.c */
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_PROTOTYPE( int do_sprofile, (void) );
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_PROTOTYPE( int do_cprofile, (void) );
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/* signal.c */
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_PROTOTYPE( int do_kill, (void) );
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_PROTOTYPE( int do_srv_kill, (void) );
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_PROTOTYPE( int process_ksig, (endpoint_t proc_nr_e, int signo) );
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_PROTOTYPE( int do_pause, (void) );
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_PROTOTYPE( int check_sig, (pid_t proc_id, int signo, int ksig) );
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_PROTOTYPE( void sig_proc, (struct mproc *rmp, int signo, int trace,
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int ksig) );
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_PROTOTYPE( int do_sigaction, (void) );
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_PROTOTYPE( int do_sigpending, (void) );
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_PROTOTYPE( int do_sigprocmask, (void) );
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_PROTOTYPE( int do_sigreturn, (void) );
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_PROTOTYPE( int do_sigsuspend, (void) );
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_PROTOTYPE( void check_pending, (struct mproc *rmp) );
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_PROTOTYPE( void restart_sigs, (struct mproc *rmp) );
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_PROTOTYPE( void vm_notify_sig_wrapper, (endpoint_t ep) );
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/* time.c */
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_PROTOTYPE( int do_stime, (void) );
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_PROTOTYPE( int do_time, (void) );
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_PROTOTYPE( int do_times, (void) );
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/* timers.c */
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_PROTOTYPE( void pm_set_timer, (timer_t *tp, int delta,
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tmr_func_t watchdog, int arg) );
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_PROTOTYPE( void pm_expire_timers, (clock_t now) );
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_PROTOTYPE( void pm_cancel_timer, (timer_t *tp) );
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/* trace.c */
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_PROTOTYPE( int do_trace, (void) );
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_PROTOTYPE( void stop_proc, (struct mproc *rmp, int sig_nr) );
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/* utility.c */
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_PROTOTYPE( pid_t get_free_pid, (void) );
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_PROTOTYPE( int no_sys, (void) );
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_PROTOTYPE( char *find_param, (const char *key) );
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_PROTOTYPE( struct mproc *find_proc, (pid_t lpid) );
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_PROTOTYPE( int pm_isokendpt, (int ep, int *proc) );
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_PROTOTYPE( void tell_fs, (struct mproc *rmp, message *m_ptr) );
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