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
156 lines
4.5 KiB
C
156 lines
4.5 KiB
C
#ifndef _IPC_H
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#define _IPC_H
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#include <minix/type.h>
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/*==========================================================================*
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* Types relating to messages. *
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*==========================================================================*/
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#define M1 1
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#define M3 3
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#define M4 4
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#define M3_STRING 14
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typedef struct {int m1i1, m1i2, m1i3; char *m1p1, *m1p2, *m1p3;} mess_1;
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typedef struct {int m2i1, m2i2, m2i3; long m2l1, m2l2; char *m2p1;
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short m2s1;} mess_2;
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typedef struct {int m3i1, m3i2; char *m3p1; char m3ca1[M3_STRING];} mess_3;
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typedef struct {long m4l1, m4l2, m4l3, m4l4, m4l5;} mess_4;
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typedef struct {short m5c1, m5c2; int m5i1, m5i2; long m5l1, m5l2, m5l3;}mess_5;
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typedef struct {long m6l1, m6l2, m6l3; short m6s1, m6s2, m6s3; char m6c1, m6c2;
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char *m6p1, *m6p2;} mess_6;
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typedef struct {int m7i1, m7i2, m7i3, m7i4; char *m7p1, *m7p2;} mess_7;
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typedef struct {int m8i1, m8i2; char *m8p1, *m8p2, *m8p3, *m8p4;} mess_8;
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typedef struct {long m9l1, m9l2, m9l3, m9l4, m9l5; short m9s1, m9s2, m9s3;
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char m9c1, m9c2; } mess_9;
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typedef struct {
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endpoint_t m_source; /* who sent the message */
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int m_type; /* what kind of message is it */
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union {
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mess_1 m_m1;
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mess_2 m_m2;
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mess_3 m_m3;
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mess_4 m_m4;
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mess_5 m_m5;
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mess_7 m_m7;
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mess_8 m_m8;
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mess_6 m_m6;
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mess_9 m_m9;
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} m_u;
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} message;
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/* The following defines provide names for useful members. */
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#define m1_i1 m_u.m_m1.m1i1
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#define m1_i2 m_u.m_m1.m1i2
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#define m1_i3 m_u.m_m1.m1i3
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#define m1_p1 m_u.m_m1.m1p1
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#define m1_p2 m_u.m_m1.m1p2
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#define m1_p3 m_u.m_m1.m1p3
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#define m2_i1 m_u.m_m2.m2i1
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#define m2_i2 m_u.m_m2.m2i2
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#define m2_i3 m_u.m_m2.m2i3
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#define m2_l1 m_u.m_m2.m2l1
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#define m2_l2 m_u.m_m2.m2l2
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#define m2_p1 m_u.m_m2.m2p1
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#define m2_s1 m_u.m_m2.m2s1
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#define m3_i1 m_u.m_m3.m3i1
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#define m3_i2 m_u.m_m3.m3i2
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#define m3_p1 m_u.m_m3.m3p1
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#define m3_ca1 m_u.m_m3.m3ca1
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#define m4_l1 m_u.m_m4.m4l1
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#define m4_l2 m_u.m_m4.m4l2
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#define m4_l3 m_u.m_m4.m4l3
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#define m4_l4 m_u.m_m4.m4l4
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#define m4_l5 m_u.m_m4.m4l5
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#define m5_c1 m_u.m_m5.m5c1
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#define m5_c2 m_u.m_m5.m5c2
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#define m5_i1 m_u.m_m5.m5i1
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#define m5_i2 m_u.m_m5.m5i2
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#define m5_l1 m_u.m_m5.m5l1
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#define m5_l2 m_u.m_m5.m5l2
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#define m5_l3 m_u.m_m5.m5l3
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#define m6_l1 m_u.m_m6.m6l1
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#define m6_l2 m_u.m_m6.m6l2
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#define m6_l3 m_u.m_m6.m6l3
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#define m6_s1 m_u.m_m6.m6s1
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#define m6_s2 m_u.m_m6.m6s2
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#define m6_s3 m_u.m_m6.m6s3
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#define m6_c1 m_u.m_m6.m6c1
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#define m6_c2 m_u.m_m6.m6c2
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#define m6_p1 m_u.m_m6.m6p1
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#define m6_p2 m_u.m_m6.m6p2
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#define m7_i1 m_u.m_m7.m7i1
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#define m7_i2 m_u.m_m7.m7i2
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#define m7_i3 m_u.m_m7.m7i3
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#define m7_i4 m_u.m_m7.m7i4
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#define m7_p1 m_u.m_m7.m7p1
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#define m7_p2 m_u.m_m7.m7p2
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#define m8_i1 m_u.m_m8.m8i1
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#define m8_i2 m_u.m_m8.m8i2
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#define m8_p1 m_u.m_m8.m8p1
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#define m8_p2 m_u.m_m8.m8p2
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#define m8_p3 m_u.m_m8.m8p3
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#define m8_p4 m_u.m_m8.m8p4
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#define m9_l1 m_u.m_m9.m9l1
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#define m9_l2 m_u.m_m9.m9l2
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#define m9_l3 m_u.m_m9.m9l3
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#define m9_l4 m_u.m_m9.m9l4
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#define m9_l5 m_u.m_m9.m9l5
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#define m9_s1 m_u.m_m9.m9s1
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#define m9_s2 m_u.m_m9.m9s2
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#define m9_s3 m_u.m_m9.m9s3
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#define m9_c1 m_u.m_m9.m9c1
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#define m9_c2 m_u.m_m9.m9c2
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/*==========================================================================*
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* Minix run-time system (IPC). *
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*==========================================================================*/
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/* Datastructure for asynchronous sends */
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typedef struct asynmsg
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{
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unsigned flags;
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endpoint_t dst;
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int result;
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message msg;
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} asynmsg_t;
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/* Defines for flags field */
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#define AMF_EMPTY 0 /* slot is not inuse */
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#define AMF_VALID 1 /* slot contains message */
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#define AMF_DONE 2 /* Kernel has processed the message. The
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* result is stored in 'result'
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*/
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#define AMF_NOTIFY 4 /* Send a notification when AMF_DONE is set */
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#define AMF_NOREPLY 8 /* Not a reply message for a SENDREC */
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/* Hide names to avoid name space pollution. */
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#define echo _echo
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#define notify _notify
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#define sendrec _sendrec
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#define receive _receive
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#define send _send
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#define sendnb _sendnb
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#define senda _senda
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_PROTOTYPE( int echo, (message *m_ptr) );
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_PROTOTYPE( int notify, (endpoint_t dest) );
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_PROTOTYPE( int sendrec, (endpoint_t src_dest, message *m_ptr) );
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_PROTOTYPE( int receive, (endpoint_t src, message *m_ptr) );
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_PROTOTYPE( int send, (endpoint_t dest, message *m_ptr) );
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_PROTOTYPE( int sendnb, (endpoint_t dest, message *m_ptr) );
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_PROTOTYPE( int senda, (asynmsg_t *table, size_t count) );
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#endif /* _IPC_H */
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