2005-07-14 17:12:12 +02:00
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/* Function prototypes for the system library. The prototypes in this file
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* are undefined to do_unused if the kernel call is not enabled in config.h.
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* The implementation is contained in src/kernel/system/.
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*
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2005-10-14 11:13:52 +02:00
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* The system library allows to access system services by doing a kernel call.
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2005-07-14 17:12:12 +02:00
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* System calls are transformed into request messages to the SYS task that is
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* responsible for handling the call. By convention, sys_call() is transformed
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* into a message with type SYS_CALL that is handled in a function do_call().
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2005-08-10 12:23:55 +02:00
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*
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* Changes:
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* Jul 30, 2005 created SYS_INT86 to support BIOS driver (Philip Homburg)
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* Jul 13, 2005 created SYS_PRIVCTL to manage services (Jorrit N. Herder)
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* Jul 09, 2005 updated SYS_KILL to signal services (Jorrit N. Herder)
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2005-10-14 11:13:52 +02:00
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* Jun 21, 2005 created SYS_NICE for nice(2) kernel call (Ben J. Gras)
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2005-08-10 12:23:55 +02:00
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* Jun 21, 2005 created SYS_MEMSET to speed up exec(2) (Ben J. Gras)
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* Apr 12, 2005 updated SYS_VCOPY for virtual_copy() (Jorrit N. Herder)
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* Jan 20, 2005 updated SYS_COPY for virtual_copy() (Jorrit N. Herder)
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* Oct 24, 2004 created SYS_GETKSIG to support PM (Jorrit N. Herder)
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* Oct 10, 2004 created handler for unused calls (Jorrit N. Herder)
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* Sep 09, 2004 updated SYS_EXIT to let services exit (Jorrit N. Herder)
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* Aug 25, 2004 rewrote SYS_SETALARM to clean up code (Jorrit N. Herder)
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* Jul 13, 2004 created SYS_SEGCTL to support drivers (Jorrit N. Herder)
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* May 24, 2004 created SYS_SDEVIO to support drivers (Jorrit N. Herder)
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* May 24, 2004 created SYS_GETINFO to retrieve info (Jorrit N. Herder)
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* Apr 18, 2004 created SYS_VDEVIO to support drivers (Jorrit N. Herder)
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* Feb 24, 2004 created SYS_IRQCTL to support drivers (Jorrit N. Herder)
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* Feb 02, 2004 created SYS_DEVIO to support drivers (Jorrit N. Herder)
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2005-04-21 16:53:53 +02:00
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*/
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#ifndef SYSTEM_H
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#define SYSTEM_H
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/* Common includes for the system library. */
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'proc number' is process slot, 'endpoint' are generation-aware process
instance numbers, encoded and decoded using macros in <minix/endpoint.h>.
proc number -> endpoint migration
. proc_nr in the interrupt hook is now an endpoint, proc_nr_e.
. m_source for messages and notifies is now an endpoint, instead of
proc number.
. isokendpt() converts an endpoint to a process number, returns
success (but fails if the process number is out of range, the
process slot is not a living process, or the given endpoint
number does not match the endpoint number in the process slot,
indicating an old process).
. okendpt() is the same as isokendpt(), but panic()s if the conversion
fails. This is mainly used for decoding message.m_source endpoints,
and other endpoint numbers in kernel data structures, which should
always be correct.
. if DEBUG_ENABLE_IPC_WARNINGS is enabled, isokendpt() and okendpt()
get passed the __FILE__ and __LINE__ of the calling lines, and
print messages about what is wrong with the endpoint number
(out of range proc, empty proc, or inconsistent endpoint number),
with the caller, making finding where the conversion failed easy
without having to include code for every call to print where things
went wrong. Sometimes this is harmless (wrong arg to a kernel call),
sometimes it's a fatal internal inconsistency (bogus m_source).
. some process table fields have been appended an _e to indicate it's
become and endpoint.
. process endpoint is stored in p_endpoint, without generation number.
it turns out the kernel never needs the generation number, except
when fork()ing, so it's decoded then.
. kernel calls all take endpoints as arguments, not proc numbers.
the one exception is sys_fork(), which needs to know in which slot
to put the child.
2006-03-03 11:00:02 +01:00
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#include "debug.h"
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2005-07-14 17:12:12 +02:00
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#include "kernel.h"
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2005-08-04 11:26:36 +02:00
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#include "proto.h"
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2005-04-21 16:53:53 +02:00
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#include "proc.h"
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2005-07-14 17:12:12 +02:00
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/* Default handler for unused kernel calls. */
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_PROTOTYPE( int do_unused, (message *m_ptr) );
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_PROTOTYPE( int do_exec, (message *m_ptr) );
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#if ! USE_EXEC
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#define do_exec do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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_PROTOTYPE( int do_fork, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_FORK
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#define do_fork do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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_PROTOTYPE( int do_newmap, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_NEWMAP
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#define do_newmap do_unused
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#endif
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_PROTOTYPE( int do_exit, (message *m_ptr) );
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#if ! USE_EXIT
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#define do_exit do_unused
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#endif
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_PROTOTYPE( int do_trace, (message *m_ptr) );
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#if ! USE_TRACE
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#define do_trace do_unused
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#endif
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2005-07-19 14:21:36 +02:00
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_PROTOTYPE( int do_nice, (message *m_ptr) );
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#if ! USE_NICE
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#define do_nice do_unused
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2005-07-14 17:12:12 +02:00
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#endif
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2005-04-21 16:53:53 +02:00
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Merge of David's ptrace branch. Summary:
o Support for ptrace T_ATTACH/T_DETACH and T_SYSCALL
o PM signal handling logic should now work properly, even with debuggers
being present
o Asynchronous PM/VFS protocol, full IPC support for senda(), and
AMF_NOREPLY senda() flag
DETAILS
Process stop and delay call handling of PM:
o Added sys_runctl() kernel call with sys_stop() and sys_resume()
aliases, for PM to stop and resume a process
o Added exception for sending/syscall-traced processes to sys_runctl(),
and matching SIGKREADY pseudo-signal to PM
o Fixed PM signal logic to deal with requests from a process after
stopping it (so-called "delay calls"), using the SIGKREADY facility
o Fixed various PM panics due to race conditions with delay calls versus
VFS calls
o Removed special PRIO_STOP priority value
o Added SYS_LOCK RTS kernel flag, to stop an individual process from
running while modifying its process structure
Signal and debugger handling in PM:
o Fixed debugger signals being dropped if a second signal arrives when
the debugger has not retrieved the first one
o Fixed debugger signals being sent to the debugger more than once
o Fixed debugger signals unpausing process in VFS; removed PM_UNPAUSE_TR
protocol message
o Detached debugger signals from general signal logic and from being
blocked on VFS calls, meaning that even VFS can now be traced
o Fixed debugger being unable to receive more than one pending signal in
one process stop
o Fixed signal delivery being delayed needlessly when multiple signals
are pending
o Fixed wait test for tracer, which was returning for children that were
not waited for
o Removed second parallel pending call from PM to VFS for any process
o Fixed process becoming runnable between exec() and debugger trap
o Added support for notifying the debugger before the parent when a
debugged child exits
o Fixed debugger death causing child to remain stopped forever
o Fixed consistently incorrect use of _NSIG
Extensions to ptrace():
o Added T_ATTACH and T_DETACH ptrace request, to attach and detach a
debugger to and from a process
o Added T_SYSCALL ptrace request, to trace system calls
o Added T_SETOPT ptrace request, to set trace options
o Added TO_TRACEFORK trace option, to attach automatically to children
of a traced process
o Added TO_ALTEXEC trace option, to send SIGSTOP instead of SIGTRAP upon
a successful exec() of the tracee
o Extended T_GETUSER ptrace support to allow retrieving a process's priv
structure
o Removed T_STOP ptrace request again, as it does not help implementing
debuggers properly
o Added MINIX3-specific ptrace test (test42)
o Added proper manual page for ptrace(2)
Asynchronous PM/VFS interface:
o Fixed asynchronous messages not being checked when receive() is called
with an endpoint other than ANY
o Added AMF_NOREPLY senda() flag, preventing such messages from
satisfying the receive part of a sendrec()
o Added asynsend3() that takes optional flags; asynsend() is now a
#define passing in 0 as third parameter
o Made PM/VFS protocol asynchronous; reintroduced tell_fs()
o Made PM_BASE request/reply number range unique
o Hacked in a horrible temporary workaround into RS to deal with newly
revealed RS-PM-VFS race condition triangle until VFS is asynchronous
System signal handling:
o Fixed shutdown logic of device drivers; removed old SIGKSTOP signal
o Removed is-superuser check from PM's do_procstat() (aka getsigset())
o Added sigset macros to allow system processes to deal with the full
signal set, rather than just the POSIX subset
Miscellaneous PM fixes:
o Split do_getset into do_get and do_set, merging common code and making
structure clearer
o Fixed setpriority() being able to put to sleep processes using an
invalid parameter, or revive zombie processes
o Made find_proc() global; removed obsolete proc_from_pid()
o Cleanup here and there
Also included:
o Fixed false-positive boot order kernel warning
o Removed last traces of old NOTIFY_FROM code
THINGS OF POSSIBLE INTEREST
o It should now be possible to run PM at any priority, even lower than
user processes
o No assumptions are made about communication speed between PM and VFS,
although communication must be FIFO
o A debugger will now receive incoming debuggee signals at kill time
only; the process may not yet be fully stopped
o A first step has been made towards making the SYSTEM task preemptible
2009-09-30 11:57:22 +02:00
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_PROTOTYPE( int do_runctl, (message *m_ptr) );
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#if ! USE_RUNCTL
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#define do_runctl do_unused
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#endif
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2005-07-14 17:12:12 +02:00
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_PROTOTYPE( int do_copy, (message *m_ptr) );
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2005-04-29 17:36:43 +02:00
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#define do_vircopy do_copy
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2005-07-14 17:12:12 +02:00
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#if ! (USE_VIRCOPY || USE_PHYSCOPY)
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#define do_copy do_unused
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#endif
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2005-04-29 17:36:43 +02:00
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_PROTOTYPE( int do_vcopy, (message *m_ptr) );
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#define do_virvcopy do_vcopy
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2005-07-14 17:12:12 +02:00
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#if ! (USE_VIRVCOPY || USE_PHYSVCOPY)
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#define do_vcopy do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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_PROTOTYPE( int do_umap, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_UMAP
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#define do_umap do_unused
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#endif
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_PROTOTYPE( int do_memset, (message *m_ptr) );
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#if ! USE_MEMSET
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#define do_memset do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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_PROTOTYPE( int do_abort, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_ABORT
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#define do_abort do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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_PROTOTYPE( int do_getinfo, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_GETINFO
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#define do_getinfo do_unused
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#endif
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2005-07-21 20:36:40 +02:00
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_PROTOTYPE( int do_privctl, (message *m_ptr) );
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#if ! USE_PRIVCTL
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#define do_privctl do_unused
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2005-07-14 17:12:12 +02:00
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#endif
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2005-04-21 16:53:53 +02:00
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2005-04-29 17:36:43 +02:00
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_PROTOTYPE( int do_segctl, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_SEGCTL
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#define do_segctl do_unused
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#endif
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_PROTOTYPE( int do_irqctl, (message *m_ptr) );
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#if ! USE_IRQCTL
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#define do_irqctl do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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2005-05-10 13:06:24 +02:00
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_PROTOTYPE( int do_devio, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_DEVIO
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#define do_devio do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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_PROTOTYPE( int do_vdevio, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_VDEVIO
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#define do_vdevio do_unused
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#endif
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2005-07-29 12:21:04 +02:00
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_PROTOTYPE( int do_int86, (message *m_ptr) );
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2005-04-21 16:53:53 +02:00
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_PROTOTYPE( int do_sdevio, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_SDEVIO
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#define do_sdevio do_unused
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#endif
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_PROTOTYPE( int do_kill, (message *m_ptr) );
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#if ! USE_KILL
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#define do_kill do_unused
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#endif
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_PROTOTYPE( int do_getksig, (message *m_ptr) );
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#if ! USE_GETKSIG
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#define do_getksig do_unused
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#endif
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_PROTOTYPE( int do_endksig, (message *m_ptr) );
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#if ! USE_ENDKSIG
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#define do_endksig do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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2005-04-29 17:36:43 +02:00
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_PROTOTYPE( int do_sigsend, (message *m_ptr) );
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2005-07-14 17:12:12 +02:00
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#if ! USE_SIGSEND
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#define do_sigsend do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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2005-07-14 17:12:12 +02:00
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_PROTOTYPE( int do_sigreturn, (message *m_ptr) );
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#if ! USE_SIGRETURN
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#define do_sigreturn do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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2005-07-14 17:12:12 +02:00
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_PROTOTYPE( int do_times, (message *m_ptr) );
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#if ! USE_TIMES
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#define do_times do_unused
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#endif
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2005-04-21 16:53:53 +02:00
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2005-07-14 17:12:12 +02:00
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_PROTOTYPE( int do_setalarm, (message *m_ptr) );
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|
#if ! USE_SETALARM
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#define do_setalarm do_unused
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#endif
|
2005-04-21 16:53:53 +02:00
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|
2007-08-07 14:21:40 +02:00
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|
|
_PROTOTYPE( int do_stime, (message *m_ptr) );
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|
2009-08-15 23:37:26 +02:00
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|
|
_PROTOTYPE( int do_vtimer, (message *m_ptr) );
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|
|
#if ! USE_VTIMER
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|
|
#define do_vtimer do_unused
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|
#endif
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|
2006-06-20 11:59:50 +02:00
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|
|
_PROTOTYPE( int do_safecopy, (message *m_ptr) );
|
2006-06-23 13:54:03 +02:00
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|
|
_PROTOTYPE( int do_vsafecopy, (message *m_ptr) );
|
2005-09-30 14:54:59 +02:00
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|
|
_PROTOTYPE( int do_iopenable, (message *m_ptr) );
|
2008-11-19 13:26:10 +01:00
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|
|
_PROTOTYPE( int do_vmctl, (message *m_ptr) );
|
2006-06-23 17:35:05 +02:00
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|
|
_PROTOTYPE( int do_setgrant, (message *m_ptr) );
|
2006-07-10 14:27:26 +02:00
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|
|
_PROTOTYPE( int do_readbios, (message *m_ptr) );
|
2008-11-19 13:26:10 +01:00
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|
|
_PROTOTYPE( int do_mapdma, (message *m_ptr) );
|
2005-09-30 14:54:59 +02:00
|
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|
|
2006-10-30 16:53:38 +01:00
|
|
|
_PROTOTYPE( int do_sprofile, (message *m_ptr) );
|
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|
|
#if ! SPROFILE
|
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|
|
#define do_sprofile do_unused
|
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|
|
#endif
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|
|
_PROTOTYPE( int do_cprofile, (message *m_ptr) );
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|
|
_PROTOTYPE( int do_profbuf, (message *m_ptr) );
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|
2008-02-22 13:25:59 +01:00
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|
|
_PROTOTYPE( int do_mapdma, (message *m_ptr) );
|
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2005-04-21 16:53:53 +02:00
|
|
|
#endif /* SYSTEM_H */
|
2005-07-14 17:12:12 +02:00
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