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minix/servers/pm/table.c
David van Moolenbroek b423d7b477 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 09:57:22 +00:00

131 lines
3.7 KiB
C
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/* This file contains the table used to map system call numbers onto the
* routines that perform them.
*/
#define _TABLE
#include "pm.h"
#include <minix/callnr.h>
#include <signal.h>
#include "mproc.h"
#include "param.h"
/* Miscellaneous */
char core_name[] = "core"; /* file name where core images are produced */
_PROTOTYPE (int (*call_vec[]), (void) ) = {
no_sys, /* 0 = unused */
do_exit, /* 1 = exit */
do_fork, /* 2 = fork */
no_sys, /* 3 = read */
no_sys, /* 4 = write */
no_sys, /* 5 = open */
no_sys, /* 6 = close */
do_waitpid, /* 7 = wait */
no_sys, /* 8 = creat */
no_sys, /* 9 = link */
no_sys, /* 10 = unlink */
do_waitpid, /* 11 = waitpid */
no_sys, /* 12 = chdir */
do_time, /* 13 = time */
no_sys, /* 14 = mknod */
no_sys, /* 15 = chmod */
no_sys, /* 16 = chown */
do_brk, /* 17 = break */
no_sys, /* 18 = stat */
no_sys, /* 19 = lseek */
do_get, /* 20 = getpid */
no_sys, /* 21 = mount */
no_sys, /* 22 = umount */
do_set, /* 23 = setuid */
do_get, /* 24 = getuid */
do_stime, /* 25 = stime */
do_trace, /* 26 = ptrace */
do_alarm, /* 27 = alarm */
no_sys, /* 28 = fstat */
do_pause, /* 29 = pause */
no_sys, /* 30 = utime */
no_sys, /* 31 = (stty) */
no_sys, /* 32 = (gtty) */
no_sys, /* 33 = access */
no_sys, /* 34 = (nice) */
no_sys, /* 35 = (ftime) */
no_sys, /* 36 = sync */
do_kill, /* 37 = kill */
no_sys, /* 38 = rename */
no_sys, /* 39 = mkdir */
no_sys, /* 40 = rmdir */
no_sys, /* 41 = dup */
no_sys, /* 42 = pipe */
do_times, /* 43 = times */
no_sys, /* 44 = (prof) */
no_sys, /* 45 = unused */
do_set, /* 46 = setgid */
do_get, /* 47 = getgid */
no_sys, /* 48 = (signal)*/
no_sys, /* 49 = unused */
no_sys, /* 50 = unused */
no_sys, /* 51 = (acct) */
no_sys, /* 52 = (phys) */
no_sys, /* 53 = (lock) */
no_sys, /* 54 = ioctl */
no_sys, /* 55 = fcntl */
no_sys, /* 56 = (mpx) */
no_sys, /* 57 = unused */
no_sys, /* 58 = unused */
do_exec, /* 59 = execve */
no_sys, /* 60 = umask */
no_sys, /* 61 = chroot */
do_set, /* 62 = setsid */
do_get, /* 63 = getpgrp */
do_itimer, /* 64 = itimer */
no_sys, /* 65 = unused */
no_sys, /* 66 = unused */
no_sys, /* 67 = unused */
no_sys, /* 68 = unused */
no_sys, /* 69 = unused */
no_sys, /* 70 = unused */
do_sigaction, /* 71 = sigaction */
do_sigsuspend, /* 72 = sigsuspend */
do_sigpending, /* 73 = sigpending */
do_sigprocmask, /* 74 = sigprocmask */
do_sigreturn, /* 75 = sigreturn */
do_reboot, /* 76 = reboot */
do_svrctl, /* 77 = svrctl */
do_sysuname, /* 78 = sysuname */
do_getsysinfo, /* 79 = getsysinfo */
no_sys, /* 80 = (getdents) */
no_sys, /* 81 = unused */
no_sys, /* 82 = (fstatfs) */
no_sys, /* 83 = unused */
no_sys, /* 84 = unused */
no_sys, /* 85 = (select) */
no_sys, /* 86 = (fchdir) */
no_sys, /* 87 = (fsync) */
do_getsetpriority, /* 88 = getpriority */
do_getsetpriority, /* 89 = setpriority */
do_time, /* 90 = gettimeofday */
do_set, /* 91 = seteuid */
do_set, /* 92 = setegid */
no_sys, /* 93 = (truncate) */
no_sys, /* 94 = (ftruncate) */
no_sys, /* 95 = (fchmod) */
no_sys, /* 96 = (fchown) */
do_getsysinfo_up,/* 97 = getsysinfo_up */
do_sprofile, /* 98 = sprofile */
do_cprofile, /* 99 = cprofile */
no_sys, /* 100 = unused */
no_sys, /* 101 = unused */
no_sys, /* 102 = unused */
no_sys, /* 103 = unused */
no_sys, /* 104 = unused */
no_sys, /* 105 = unused */
no_sys, /* 106 = unused */
no_sys, /* 107 = unused */
do_adddma, /* 108 = adddma */
do_deldma, /* 109 = deldma */
do_getdma, /* 110 = getdma */
};
/* This should not fail with "array size is negative": */
extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];
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