b423d7b477
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
86 lines
3.3 KiB
C
86 lines
3.3 KiB
C
/* Types and constants shared between the generic and device dependent
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* device driver code.
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*/
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#define _POSIX_SOURCE 1 /* tell headers to include POSIX stuff */
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#define _MINIX 1 /* tell headers to include MINIX stuff */
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#define _SYSTEM 1 /* get negative error number in <errno.h> */
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/* The following are so basic, all the *.c files get them automatically. */
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#include <minix/config.h> /* MUST be first */
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#include <ansi.h> /* MUST be second */
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/com.h>
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#include <minix/callnr.h>
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#include <sys/types.h>
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#include <minix/const.h>
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#include <minix/syslib.h>
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#include <minix/sysutil.h>
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#include <string.h>
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#include <limits.h>
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#include <stddef.h>
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#include <errno.h>
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#include <minix/partition.h>
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#include <minix/u64.h>
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/* Info about and entry points into the device dependent code. */
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struct driver {
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_PROTOTYPE( char *(*dr_name), (void) );
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_PROTOTYPE( int (*dr_open), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_close), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_ioctl), (struct driver *dp, message *m_ptr, int safe) );
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_PROTOTYPE( struct device *(*dr_prepare), (int device) );
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_PROTOTYPE( int (*dr_transfer), (int proc_nr, int opcode, u64_t position,
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iovec_t *iov, unsigned nr_req, int safe) );
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_PROTOTYPE( void (*dr_cleanup), (void) );
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_PROTOTYPE( void (*dr_geometry), (struct partition *entry) );
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_PROTOTYPE( void (*dr_signal), (struct driver *dp, sigset_t *set) );
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_PROTOTYPE( void (*dr_alarm), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_cancel), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_select), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_other), (struct driver *dp, message *m_ptr, int safe) );
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_PROTOTYPE( int (*dr_hw_int), (struct driver *dp, message *m_ptr) );
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};
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/* Base and size of a partition in bytes. */
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struct device {
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u64_t dv_base;
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u64_t dv_size;
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};
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#define NIL_DEV ((struct device *) 0)
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/* Functions defined by driver.c: */
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_PROTOTYPE( void driver_task, (struct driver *dr) );
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_PROTOTYPE( char *no_name, (void) );
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_PROTOTYPE( int do_nop, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( struct device *nop_prepare, (int device) );
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_PROTOTYPE( void nop_cleanup, (void) );
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_PROTOTYPE( void nop_task, (void) );
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_PROTOTYPE( void nop_signal, (struct driver *dp, sigset_t *set) );
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_PROTOTYPE( void nop_alarm, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int nop_cancel, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int nop_select, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int do_diocntl, (struct driver *dp, message *m_ptr, int safe) );
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_PROTOTYPE( int nop_ioctl, (struct driver *dp, message *m_ptr, int safe) );
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_PROTOTYPE( int mq_queue, (message *m_ptr) );
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/* Parameters for the disk drive. */
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#define SECTOR_SIZE 512 /* physical sector size in bytes */
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#define SECTOR_SHIFT 9 /* for division */
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#define SECTOR_MASK 511 /* and remainder */
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/* Size of the DMA buffer buffer in bytes. */
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#define USE_EXTRA_DMA_BUF 0 /* usually not needed */
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#define DMA_BUF_SIZE (DMA_SECTORS * SECTOR_SIZE)
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#if (CHIP == INTEL)
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extern u8_t *tmp_buf; /* the DMA buffer */
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#else
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extern u8_t tmp_buf[]; /* the DMA buffer */
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#endif
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extern phys_bytes tmp_phys; /* phys address of DMA buffer */
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