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
202 lines
5.5 KiB
C
202 lines
5.5 KiB
C
/* 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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* The system library allows to access system services by doing a kernel call.
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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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*
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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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* Jun 21, 2005 created SYS_NICE for nice(2) kernel call (Ben J. Gras)
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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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*/
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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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#include "debug.h"
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#include "kernel.h"
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#include "proto.h"
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#include "proc.h"
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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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_PROTOTYPE( int do_fork, (message *m_ptr) );
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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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_PROTOTYPE( int do_newmap, (message *m_ptr) );
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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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_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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#endif
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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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_PROTOTYPE( int do_copy, (message *m_ptr) );
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#define do_vircopy do_copy
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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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_PROTOTYPE( int do_vcopy, (message *m_ptr) );
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#define do_virvcopy do_vcopy
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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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_PROTOTYPE( int do_umap, (message *m_ptr) );
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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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_PROTOTYPE( int do_abort, (message *m_ptr) );
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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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_PROTOTYPE( int do_getinfo, (message *m_ptr) );
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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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_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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#endif
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_PROTOTYPE( int do_segctl, (message *m_ptr) );
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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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_PROTOTYPE( int do_devio, (message *m_ptr) );
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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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_PROTOTYPE( int do_vdevio, (message *m_ptr) );
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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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_PROTOTYPE( int do_int86, (message *m_ptr) );
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_PROTOTYPE( int do_sdevio, (message *m_ptr) );
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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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_PROTOTYPE( int do_sigsend, (message *m_ptr) );
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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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_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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_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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_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
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_PROTOTYPE( int do_stime, (message *m_ptr) );
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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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_PROTOTYPE( int do_safecopy, (message *m_ptr) );
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_PROTOTYPE( int do_vsafecopy, (message *m_ptr) );
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_PROTOTYPE( int do_iopenable, (message *m_ptr) );
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_PROTOTYPE( int do_vmctl, (message *m_ptr) );
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_PROTOTYPE( int do_setgrant, (message *m_ptr) );
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_PROTOTYPE( int do_readbios, (message *m_ptr) );
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_PROTOTYPE( int do_mapdma, (message *m_ptr) );
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_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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_PROTOTYPE( int do_mapdma, (message *m_ptr) );
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#endif /* SYSTEM_H */
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