minix/kernel/config.h

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#ifndef CONFIG_H
#define CONFIG_H
/* This file defines the kernel configuration. It allows to set sizes of some
* kernel buffers and to enable or disable debugging code, timing features,
* and individual kernel calls.
*
* Changes:
* Jul 11, 2005 Created. (Jorrit N. Herder)
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*/
/* In embedded and sensor applications, not all the kernel calls may be
* needed. In this section you can specify which kernel calls are needed
* and which are not. The code for unneeded kernel calls is not included in
* the system binary, making it smaller. If you are not sure, it is best
* to keep all kernel calls enabled.
*/
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#define USE_FORK 1 /* fork a new process */
#define USE_NEWMAP 1 /* set a new memory map */
#define USE_EXEC 1 /* update process after execute */
#define USE_EXIT 1 /* clean up after process exit */
#define USE_TRACE 1 /* process information and tracing */
#define USE_GETKSIG 1 /* retrieve pending kernel signals */
#define USE_ENDKSIG 1 /* finish pending kernel signals */
#define USE_KILL 1 /* send a signal to a process */
#define USE_SIGSEND 1 /* send POSIX-style signal */
#define USE_SIGRETURN 1 /* sys_sigreturn(proc_nr, ctxt_ptr, flags) */
#define USE_ABORT 1 /* shut down MINIX */
#define USE_GETINFO 1 /* retrieve a copy of kernel data */
#define USE_TIMES 1 /* get process and system time info */
#define USE_SETALARM 1 /* schedule a synchronous alarm */
#define USE_VTIMER 1 /* set or retrieve a process-virtual timer */
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#define USE_DEVIO 1 /* read or write a single I/O port */
#define USE_VDEVIO 1 /* process vector with I/O requests */
#define USE_SDEVIO 1 /* perform I/O request on a buffer */
#define USE_IRQCTL 1 /* set an interrupt policy */
#define USE_SEGCTL 1 /* set up a remote segment */
#define USE_PRIVCTL 1 /* system privileges control */
#define USE_NICE 1 /* change scheduling priority */
#define USE_UMAP 1 /* map virtual to physical address */
#define USE_VIRCOPY 1 /* copy using virtual addressing */
#define USE_VIRVCOPY 1 /* vector with virtual copy requests */
#define USE_PHYSCOPY 1 /* copy using physical addressing */
#define USE_PHYSVCOPY 1 /* vector with physical copy requests */
#define USE_MEMSET 1 /* write char to a given memory area */
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
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#define USE_RUNCTL 1 /* control stop flags of a process */
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/* Length of program names stored in the process table. This is only used
* for the debugging dumps that can be generated with the IS server. The PM
* server keeps its own copy of the program name.
*/
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#define P_NAME_LEN 8
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/* This section contains defines for valuable system resources that are used
* by device drivers. The number of elements of the vectors is determined by
* the maximum needed by any given driver. The number of interrupt hooks may
* be incremented on systems with many device drivers.
*/
#define NR_IRQ_HOOKS 16 /* number of interrupt hooks */
#define VDEVIO_BUF_SIZE 64 /* max elements per VDEVIO request */
#define VCOPY_VEC_SIZE 16 /* max elements per VCOPY request */
/* How many bytes for the kernel stack. Space allocated in mpx.s. */
#define K_STACK_BYTES 1024
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Split of architecture-dependent and -independent functions for i386, mainly in the kernel and headers. This split based on work by Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture port. . kernel does not program the interrupt controller directly, do any other architecture-dependent operations, or contain assembly any more, but uses architecture-dependent functions in arch/$(ARCH)/. . architecture-dependent constants and types defined in arch/$(ARCH)/include. . <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now, architecture-independent functions. . int86, sdevio, readbios, and iopenable are now i386-specific kernel calls and live in arch/i386/do_* now. . i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have gone, and 'machine.protected' is gone (and always taken to be 1 in i386). If 86 support is to return, it should be a new architecture. . prototypes for the architecture-dependent functions defined in kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h . /etc/make.conf included in makefiles and shell scripts that need to know the building architecture; it defines ARCH=<arch>, currently only i386. . some basic per-architecture build support outside of the kernel (lib) . in clock.c, only dequeue a process if it was ready . fixes for new include files files deleted: . mpx/klib.s - only for choosing between mpx/klib86 and -386 . klib86.s - only for 86 i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/: . mpx386.s (entry point) . klib386.s . sconst.h . exception.c . protect.c . protect.h . i8269.c
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#define K_PARAM_SIZE 512
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#endif /* CONFIG_H */