Implemented user debugging support for x86_64.

Reused x86 arch_user_debugger.cpp, with a few minor changes to make
the code work for both 32 and 64 bit. Something isn't quite working
right, if a breakpoint is hit the kernel will hang. Other than that
everything appears to work correctly.

Changed cookie type for get_next_area_info() to ssize_t.

The cookie is used to store the base address of the area that was just
visited. On 64-bit systems, int32 is not sufficient. Therefore, changed
to ssize_t which retains compatibility on x86 while expanding to a
sufficient size on x86_64.

Changed argument type of fcntl syscall from uint32 to size_t.

Since this argument may be used to pass pointers, uint32 is not
correct for 64-bit. Effectively no change on 32-bit targets, both
size_t and uint32 are unsigned long there.

Compile arch_real_time_clock.cpp and arch_system_info.cpp for x86_64.

* Introduced new fs_lopen_attr_dir() function that opens the attribute
directory of a file without traversing leaf links (just like lstat()).
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42620 a95241bf-73f2-0310-859d-f6bbb57e9c96

Add private get_memory_properties() syscall which allows one to retrieve the
address protection bits as well as the wiring flags for an arbitrary address
in a team's address space. Will be used in the debugger for the purposes
of the memory inspector/editor, in order to determine whether it can in fact
allow editing for the currently inspected address range.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42129 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged signals-merge branch into trunk with the following changes:
* Reorganized the kernel locking related to threads and teams.
* We now discriminate correctly between process and thread signals. Signal
handlers have been moved to teams. Fixes #5679.
* Implemented real-time signal support, including signal queuing, SA_SIGINFO
support, sigqueue(), sigwaitinfo(), sigtimedwait(), waitid(), and the addition
of the real-time signal range. Closes #1935 and #2695.
* Gave SIGBUS a separate signal number. Fixes #6704.
* Implemented <time.h> clock and timer support, and fixed/completed alarm() and
[set]itimer(). Closes #5682.
* Implemented support for thread cancellation. Closes #5686.
* Moved send_signal() from <signal.h> to <OS.h>. Fixes #7554.
* Lots over smaller more or less related changes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42116 a95241bf-73f2-0310-859d-f6bbb57e9c96

Closing #7056:
* inherit umask of calling process to images loaded via exec...()

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40071 a95241bf-73f2-0310-859d-f6bbb57e9c96

[_{kern,user}_]{start,stop}_system_watching()
-> [_{kern,user}_]{start,stop}_watching_system()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39872 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented a generic system watching mechanism with a userland API. Currently
only a few events can be watched (team creation/deletion/exec, thread creation/
deletion/name changes). The functions start_system_watching()/
stop_system_watching start/stop watching events.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39862 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added new private API to get more information on a team:
* Userland interface: get_extended_team_info().
* Syscall: _kern_get_extended_team_info.

Only partially implemented yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39453 a95241bf-73f2-0310-859d-f6bbb57e9c96

Optimised passing around of timezone a bit
* _kern_[sg]et_timezone() now accepts/passes out the timezone name, too
* adjust Time preflet and clockconfig to pass the timezone name into the kernel
when calling _kern_set_timezone()
* ajust implementation of tzset() to fetch the timezone name from the kernel
via _kern_get_timezone() instead of reading 'libroot_timezone_info'
* the Time preflet no longer writes 'libroot_timezone_info'


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38164 a95241bf-73f2-0310-859d-f6bbb57e9c96

More consolidation of timezone code:
* dropped DaylightSavingTime from real_time_clock code in kernel, it was
never really being used for what it meant (and just being referred to by
gettimeofday(), which put a different meaning to it
* adjusted the syscalls get_timezone() & set_timezone() as well as their callers
accordingly
* got rid of get_rtc_info() and rtc_info struct in kernel, as it was only
being referred to by the FAT add-on and that one (like gettimeofday()) put a
different meaning to tz_minuteswest. Added a comment to FAT's util.c
showing a possible solution, should the hardcoded GMT timezone pose a problem.
* fixed declaration of gettimeofday() to match POSIX base specs, issue 7
* changed implementation of gettimeofday() to not bother trying to fill struct
timezone - it was using wrong values before, anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37888 a95241bf-73f2-0310-859d-f6bbb57e9c96

Made some progress with consolidation of timezone-related code:
* renamed syscalls _kern_[gs]et_tzfilename
to _kern_[gs]et_real_time_clock_is_gmt, as the filename part is no longer
relevant (and the two corresponding parameters were removed)
* C++-ified and reworked clockconfig to use the info from 'Time settings'
to setup the timezone info during boot
* removed invocation of _kern_get_tzfilename() from tzset(), as the syscall
no longer exists and tzset() is currently broken anyway
* adjusted the Time preflet to use the renamed syscall when getting/setting
the RTC info


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37881 a95241bf-73f2-0310-859d-f6bbb57e9c96

Changed the type of the "op" parameter of the fs_vnode_ops::ioctl() hook and
the _kern_ioctl() syscall from ulong to uint32.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36927 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed some parameters of VM syscalls from int to uint32, mostly for sake
of consistency.
* Moved the B_OVERCOMMITTING_AREA flag from B_KERNEL_AREA_FLAGS to
B_USER_AREA_FLAGS, since we really allow it to be passed from userland.
* Most VM syscalls check the provided protection against B_USER_AREA_FLAGS
instead of B_USER_PROTECTION, now. This way they allow for
B_OVERCOMMITTING_AREA as well.
* _user_map_file(), _user_set_memory_protection(): Check the protection like
the other syscalls do and use fix_protection() instead of doing that
manually.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36572 a95241bf-73f2-0310-859d-f6bbb57e9c96

bonefish+axeld:
* Implemented a tiny bit more sophisticated version of
estimate_max_scheduling_latency() that uses a syscall that lets the scheduler
decide.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36170 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved created subdirectory src/system/kernel/lock.cpp to new subdirectory
locks.
* Added syscalls for a new kind of mutex. A mutex consists only of an int32 and
doesn't require any kernel resources. So it's initialization cannot fail
(it consists only of setting the mutex value to 0). An uncontended lock or
unlock operation can basically consist of an atomic_*() in userland. The
syscalls (when the mutex is contended) are a bit more expensive than semaphore
operations, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36158 a95241bf-73f2-0310-859d-f6bbb57e9c96

* This fixes the "'noreturn' function returns" warning in exit().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34293 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Forgot to add linkat(), this really closes #4928 now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34289 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added missing AT_EACCESS.
* Implemented renameat(), faccessat(), fchownat(), fchmodat(), and mkfifoat().
* Added stub for mknodat().
* The kernel backend for faccessat() does not yet differentiate between
effective and real user/group IDs, though.
* Removed B_ENABLE_INCOMPLETE_POSIX_AT_SUPPORT, as we now support everything
(more or less). This also closes ticket #4928.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34288 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added syscall _kern_kernel_debugger() to enter the kernel debugger.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31965 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Introduced dedicated syscalls for the deprecated BeOS fs_attr API. Before,
each attribute access needed 3 syscalls, now only one as it should.
* Renamed the new Haiku call fs_open_attr() to fs_fopen_attr(), and added a new
function fs_open_attr() that takes a path (same semantics as the
fs_[f]open_attr_dir() functions already present in BeOS).
* Merged former _kern_open_attr(), and _kern_create_attr() into one syscall.
* Cleaned up vfs.h.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31881 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Discarded the "parametersSize" parameter from various disk device manager
functions.
* Since we now use UserStringParameter, this fixes the missing null termination
of the parameter string, and thus bug #4045.
* Removed UserMemoryParameter, as it's no longer in use.
* Adjusted syscalls accordingly.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31779 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Always include the public arch_debugger.h headers. The structures defined
there are prefixed with the respective architecture name. Useful for remote
debugging a different architecture.
* <x86/arch_debugger.h>: Introduced a structure for the FPU state, so that it
isn't left to the debugger.
* Removed the _kern_get_thread_cpu_state() syscall. Was originally intended for
bdb compatiblity, but isn't really needed.
* Kernel x86 arch_get_debug_cpu_state(): The use of fnsave was broken, since
it reinits the FPU after saving the state. This resulted in weird results
when debugging functions using the FPU. We now use fxsave, if available.
Otherwise fnsave + frstor should be used -- not fully implemented yet.
Same for arch_set_debug_cpu_state().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31682 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Work-in-progress on a kernel profile service that can be evaluated from
userland afterwards.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31621 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Renamed _kern_reserve_heap_address_range() to _kern_reserve_address_range(),
and added a _kern_unreserve_address_range() as well.
* The runtime loader now reserves the space needed for all its areas first
to make sure there is enough space left for all areas of a single image.
* This also fixes the final part of bug #4008.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31115 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added an "unmapAddressRange" argument to the file mapping syscall. This is
the first part of making the runtime loader behave itself; it should already
make Clockwerk run okay with any number of translators (even if not all of
them will work yet).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31113 a95241bf-73f2-0310-859d-f6bbb57e9c96

User debugger support:
* Generalized address checks. The debugger can now also read the commpage.
* Added new syscall _kern_get_thread_cpu_state() to get the CPU state of a
not running thread. Introduced arch_get_thread_debug_cpu_state() for that
purpose, which is only implemented for x86 ATM (uses the new
i386_get_thread_user_iframe()).
* Don't allow a debugger to change a thread's "esp" anymore. That's the esp
register in the kernel. "user_esp" can still be changed.
* Generally set RF (resume flag) in eflags in interrupt handlers, not only
after a instruction breakpoint debug exception. This should prevent
breakpoints from being triggered more than once (e.g. when the breakpoint is
on an instruction that can cause a page fault). I still saw those with bdb
in VMware, but that might be a VMware bug.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31045 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Scheduler/wait object listener:
- Moved scheduler listening interface to <listeners.h> and added more
convenient to use templatized notification functions.
- Added a listener mechanism for the wait objects (semaphores, condition
variables, mutex, rw_lock).
* system profiler:
- Hopefully fixed locking issues related to notifying the profiler thread
for good. We still had an inconsistent locking order, since the scheduler
notification callbacks are invoked with the thread lock held and have to
acquire the object lock then, while the other callbacks acquired the object
lock first and as a side effect of ConditionVariable::NotifyOne() acquired
the thread lock. Now we make sure the object lock is the innermost lock.
- Track the number of dropped events due to a full buffer.
_user_system_profiler_next_buffer() returns this count now.
- When scheduling profiling events are requested also listen to wait objects
and generate the respective profiling events. We send those events lazily
and cache the infos to avoid resending an event for the same wait object.
- When starting profiling we do now generate "thread scheduled" events for
the already running threads.
- _user_system_profiler_start(): Check whether the parameters pointer is a
userland address at all.
- The system_profiler_team_added event does now also contain the team's name.
* Added a sem_get_name_unsafe() returning a semaphore's name. It is "unsafe",
since the caller has to ensure that the semaphore exists and continues to
exist as long as the returned name is used.
* Adjusted the "profile" and "scheduling_recorder" according to the system
profiling changes. The latter prints the number of dropped events, now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30345 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed the interface of _kern_system_profiler_start(). The parameters are
passed in a structure now, so it is easier to extend it and ignore unused
parameters.
* One can now select which system profiling events one is interested in.
* Added scheduling events to the system profiling interface. Those are pretty
much the ones recorded when scheduler tracing is enabled. Still missing are
the "wait object" events that allow to interpret what a thread is waiting
for.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30243 a95241bf-73f2-0310-859d-f6bbb57e9c96

The kernel side of a new system-wide sampling-based profiling mechanism.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30127 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented a basic notification mechanism. Right now, only media changes and
device additions/removals can be monitored.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29582 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Made the use of file devices more convenient and complete by adding
the methods IsFile() and GetFilePath() to BDiskDevice, and
BDiskDeviceRoster::GetFileDeviceForPath().
* Added new syscalls to implement this functionality.
* Added new flag B_DISK_DEVICE_IS_FILE.
* Fixed wrong operator precedence assumption in the BDiskDevice class at
several places.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28052 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added syscall _kern_read_kernel_image_symbols() for reading a kernel
image's symbol and string tables.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27687 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented a (private for now) get_system_info_etc() call, that can retrieve
various system information.
* Implemented retrieving some VM stats via this call.
* The VM now maintains a page fault counter, and sets system_info::page_faults
accordingly.
* Added a (pretty simple) "vmstat" command line app.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27597 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Adding msg{rcv,snd,get,ctl} syscalls to the system
* Add message queue init function call to main.cpp


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27417 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed bug in the "scheduler" command: The check when a thread was
unscheduled was incorrect.
* Introduced _kern_analyze_scheduling() syscall. It requires scheduler
kernel tracing to be enabled. It uses the tracing entries for a given
period of time to do a similar analysis the "scheduler" debugger
command does (i.e. number of runs, run time, latencies, preemption
times) for each thread. Additionally the analysis includes for each
thread how long the thread waited on each locking primitive in total.
* Added kernel tracing for the creation of semaphores and initialization
of condition variables, mutexes, and rw locks. The enabling macro is
SCHEDULING_ANALYSIS_TRACING. The only purpose is to provide
_kern_analyze_scheduling() with more info on the locking primitives
(the name in particular).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27304 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented mprotect(). A vm_area does now have an optional array
specifying the protection of each page (4 bits per page).
* Added no-op implementation of posix_madvise().
* Replaced a few "addr_t size" parameters by "size_t size".


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26871 a95241bf-73f2-0310-859d-f6bbb57e9c96

First patch by Salvatore to implement XSI semaphores with a few changes
by myself:
* renamed xsi_do_undo() to xsi_sem_undo() (there is more to XSI than sems).
* Fixed coding style issues in sys/sem.h and xsi_sem.cpp.
* Added _kern_*() syscall prototypes to syscalls.h.
* Added a TODO in xsi_sem.cpp and xsi_semaphore.h about moving union semun to
a shared header.
* Made the team::xsi_sem_undo_requests int32 - due to padding, it would have
needed 4 bytes anyway; please always use specific types over int/short/long.
* xsi_sem_undo() now checks if it needs to do anything - the calls in team.cpp
no longer needs to do this.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26676 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed the _kern_exec() and _kern_load_image() syscalls. They expect
a flattened argument/environment buffer now. This simplifies the work
for the kernel a bit, since it can just copy the buffer and check
whether it looks OK instead of messing around with individual strings.
The runtime loader also gets a flattened array.
* Set the maximum size of the arguments/environment buffer to 128 KB.
When more arguments are passed, we fail with a proper error code
(instead of just truncating the arguments as before).
* On exec*() the first argument was silently replaced by the given path
name, which is not correct.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26119 a95241bf-73f2-0310-859d-f6bbb57e9c96

Removed <syscalls.h>' dependency to <semaphore.h> by giving the sem_t
structure a name.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26015 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added vm_page_write_modified_page_range(), which is similar to
vm_page_write_modified_pages(), save that it only writes pages in the
given range.
* Added vm_page_schedule_write_page_range() which schedules all modified
pages in the given cache's range for writing by the page writer.
* Added _kern_sync_memory() syscall and the msync() POSIX function.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25620 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Introduced new header directory headers/private/system which is supposed
to contain headers shared by kernel and userland (mainly libroot).
* Moved quite a few private kernel headers to the new location. Split
several kernel headers into a shared part and one that is still kernel
private. Adjusted all affected Jamfiles and source in the standard x86
build accordingly. The build for other architectures and for test code
may be broken.
* Quite a bit of userland code still includes private kernel headers.
Mostly those are <util/*> headers. The ones that aren't strictly
kernel-only should be moved to some other place (maybe
headers/private/shared/util).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25486 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented user debugging support for x86_64.

Reused x86 arch_user_debugger.cpp, with a few minor changes to make
the code work for both 32 and 64 bit. Something isn't quite working
right, if a breakpoint is hit the kernel will hang. Other than that
everything appears to work correctly.

Changed cookie type for get_next_area_info() to ssize_t.

The cookie is used to store the base address of the area that was just
visited. On 64-bit systems, int32 is not sufficient. Therefore, changed
to ssize_t which retains compatibility on x86 while expanding to a
sufficient size on x86_64.

Changed argument type of fcntl syscall from uint32 to size_t.

Since this argument may be used to pass pointers, uint32 is not
correct for 64-bit. Effectively no change on 32-bit targets, both
size_t and uint32 are unsigned long there.

Compile arch_real_time_clock.cpp and arch_system_info.cpp for x86_64.

* Introduced new fs_lopen_attr_dir() function that opens the attribute
directory of a file without traversing leaf links (just like lstat()).
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42620 a95241bf-73f2-0310-859d-f6bbb57e9c96

Add private get_memory_properties() syscall which allows one to retrieve the
address protection bits as well as the wiring flags for an arbitrary address
in a team's address space. Will be used in the debugger for the purposes
of the memory inspector/editor, in order to determine whether it can in fact
allow editing for the currently inspected address range.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42129 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged signals-merge branch into trunk with the following changes:
* Reorganized the kernel locking related to threads and teams.
* We now discriminate correctly between process and thread signals. Signal
handlers have been moved to teams. Fixes #5679.
* Implemented real-time signal support, including signal queuing, SA_SIGINFO
support, sigqueue(), sigwaitinfo(), sigtimedwait(), waitid(), and the addition
of the real-time signal range. Closes #1935 and #2695.
* Gave SIGBUS a separate signal number. Fixes #6704.
* Implemented <time.h> clock and timer support, and fixed/completed alarm() and
[set]itimer(). Closes #5682.
* Implemented support for thread cancellation. Closes #5686.
* Moved send_signal() from <signal.h> to <OS.h>. Fixes #7554.
* Lots over smaller more or less related changes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42116 a95241bf-73f2-0310-859d-f6bbb57e9c96

Closing #7056:
* inherit umask of calling process to images loaded via exec...()

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40071 a95241bf-73f2-0310-859d-f6bbb57e9c96

[_{kern,user}_]{start,stop}_system_watching()
-> [_{kern,user}_]{start,stop}_watching_system()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39872 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented a generic system watching mechanism with a userland API. Currently
only a few events can be watched (team creation/deletion/exec, thread creation/
deletion/name changes). The functions start_system_watching()/
stop_system_watching start/stop watching events.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39862 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added new private API to get more information on a team:
* Userland interface: get_extended_team_info().
* Syscall: _kern_get_extended_team_info.

Only partially implemented yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39453 a95241bf-73f2-0310-859d-f6bbb57e9c96

Optimised passing around of timezone a bit
* _kern_[sg]et_timezone() now accepts/passes out the timezone name, too
* adjust Time preflet and clockconfig to pass the timezone name into the kernel
when calling _kern_set_timezone()
* ajust implementation of tzset() to fetch the timezone name from the kernel
via _kern_get_timezone() instead of reading 'libroot_timezone_info'
* the Time preflet no longer writes 'libroot_timezone_info'


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38164 a95241bf-73f2-0310-859d-f6bbb57e9c96

More consolidation of timezone code:
* dropped DaylightSavingTime from real_time_clock code in kernel, it was
never really being used for what it meant (and just being referred to by
gettimeofday(), which put a different meaning to it
* adjusted the syscalls get_timezone() & set_timezone() as well as their callers
accordingly
* got rid of get_rtc_info() and rtc_info struct in kernel, as it was only
being referred to by the FAT add-on and that one (like gettimeofday()) put a
different meaning to tz_minuteswest. Added a comment to FAT's util.c
showing a possible solution, should the hardcoded GMT timezone pose a problem.
* fixed declaration of gettimeofday() to match POSIX base specs, issue 7
* changed implementation of gettimeofday() to not bother trying to fill struct
timezone - it was using wrong values before, anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37888 a95241bf-73f2-0310-859d-f6bbb57e9c96

Made some progress with consolidation of timezone-related code:
* renamed syscalls _kern_[gs]et_tzfilename
to _kern_[gs]et_real_time_clock_is_gmt, as the filename part is no longer
relevant (and the two corresponding parameters were removed)
* C++-ified and reworked clockconfig to use the info from 'Time settings'
to setup the timezone info during boot
* removed invocation of _kern_get_tzfilename() from tzset(), as the syscall
no longer exists and tzset() is currently broken anyway
* adjusted the Time preflet to use the renamed syscall when getting/setting
the RTC info


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37881 a95241bf-73f2-0310-859d-f6bbb57e9c96

Changed the type of the "op" parameter of the fs_vnode_ops::ioctl() hook and
the _kern_ioctl() syscall from ulong to uint32.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36927 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed some parameters of VM syscalls from int to uint32, mostly for sake
of consistency.
* Moved the B_OVERCOMMITTING_AREA flag from B_KERNEL_AREA_FLAGS to
B_USER_AREA_FLAGS, since we really allow it to be passed from userland.
* Most VM syscalls check the provided protection against B_USER_AREA_FLAGS
instead of B_USER_PROTECTION, now. This way they allow for
B_OVERCOMMITTING_AREA as well.
* _user_map_file(), _user_set_memory_protection(): Check the protection like
the other syscalls do and use fix_protection() instead of doing that
manually.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36572 a95241bf-73f2-0310-859d-f6bbb57e9c96

bonefish+axeld:
* Implemented a tiny bit more sophisticated version of
estimate_max_scheduling_latency() that uses a syscall that lets the scheduler
decide.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36170 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved created subdirectory src/system/kernel/lock.cpp to new subdirectory
locks.
* Added syscalls for a new kind of mutex. A mutex consists only of an int32 and
doesn't require any kernel resources. So it's initialization cannot fail
(it consists only of setting the mutex value to 0). An uncontended lock or
unlock operation can basically consist of an atomic_*() in userland. The
syscalls (when the mutex is contended) are a bit more expensive than semaphore
operations, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36158 a95241bf-73f2-0310-859d-f6bbb57e9c96

* This fixes the "'noreturn' function returns" warning in exit().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34293 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Forgot to add linkat(), this really closes #4928 now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34289 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added missing AT_EACCESS.
* Implemented renameat(), faccessat(), fchownat(), fchmodat(), and mkfifoat().
* Added stub for mknodat().
* The kernel backend for faccessat() does not yet differentiate between
effective and real user/group IDs, though.
* Removed B_ENABLE_INCOMPLETE_POSIX_AT_SUPPORT, as we now support everything
(more or less). This also closes ticket #4928.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34288 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added syscall _kern_kernel_debugger() to enter the kernel debugger.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31965 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Introduced dedicated syscalls for the deprecated BeOS fs_attr API. Before,
each attribute access needed 3 syscalls, now only one as it should.
* Renamed the new Haiku call fs_open_attr() to fs_fopen_attr(), and added a new
function fs_open_attr() that takes a path (same semantics as the
fs_[f]open_attr_dir() functions already present in BeOS).
* Merged former _kern_open_attr(), and _kern_create_attr() into one syscall.
* Cleaned up vfs.h.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31881 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Discarded the "parametersSize" parameter from various disk device manager
functions.
* Since we now use UserStringParameter, this fixes the missing null termination
of the parameter string, and thus bug #4045.
* Removed UserMemoryParameter, as it's no longer in use.
* Adjusted syscalls accordingly.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31779 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Always include the public arch_debugger.h headers. The structures defined
there are prefixed with the respective architecture name. Useful for remote
debugging a different architecture.
* <x86/arch_debugger.h>: Introduced a structure for the FPU state, so that it
isn't left to the debugger.
* Removed the _kern_get_thread_cpu_state() syscall. Was originally intended for
bdb compatiblity, but isn't really needed.
* Kernel x86 arch_get_debug_cpu_state(): The use of fnsave was broken, since
it reinits the FPU after saving the state. This resulted in weird results
when debugging functions using the FPU. We now use fxsave, if available.
Otherwise fnsave + frstor should be used -- not fully implemented yet.
Same for arch_set_debug_cpu_state().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31682 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Work-in-progress on a kernel profile service that can be evaluated from
userland afterwards.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31621 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Renamed _kern_reserve_heap_address_range() to _kern_reserve_address_range(),
and added a _kern_unreserve_address_range() as well.
* The runtime loader now reserves the space needed for all its areas first
to make sure there is enough space left for all areas of a single image.
* This also fixes the final part of bug #4008.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31115 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added an "unmapAddressRange" argument to the file mapping syscall. This is
the first part of making the runtime loader behave itself; it should already
make Clockwerk run okay with any number of translators (even if not all of
them will work yet).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31113 a95241bf-73f2-0310-859d-f6bbb57e9c96

User debugger support:
* Generalized address checks. The debugger can now also read the commpage.
* Added new syscall _kern_get_thread_cpu_state() to get the CPU state of a
not running thread. Introduced arch_get_thread_debug_cpu_state() for that
purpose, which is only implemented for x86 ATM (uses the new
i386_get_thread_user_iframe()).
* Don't allow a debugger to change a thread's "esp" anymore. That's the esp
register in the kernel. "user_esp" can still be changed.
* Generally set RF (resume flag) in eflags in interrupt handlers, not only
after a instruction breakpoint debug exception. This should prevent
breakpoints from being triggered more than once (e.g. when the breakpoint is
on an instruction that can cause a page fault). I still saw those with bdb
in VMware, but that might be a VMware bug.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31045 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Scheduler/wait object listener:
- Moved scheduler listening interface to <listeners.h> and added more
convenient to use templatized notification functions.
- Added a listener mechanism for the wait objects (semaphores, condition
variables, mutex, rw_lock).
* system profiler:
- Hopefully fixed locking issues related to notifying the profiler thread
for good. We still had an inconsistent locking order, since the scheduler
notification callbacks are invoked with the thread lock held and have to
acquire the object lock then, while the other callbacks acquired the object
lock first and as a side effect of ConditionVariable::NotifyOne() acquired
the thread lock. Now we make sure the object lock is the innermost lock.
- Track the number of dropped events due to a full buffer.
_user_system_profiler_next_buffer() returns this count now.
- When scheduling profiling events are requested also listen to wait objects
and generate the respective profiling events. We send those events lazily
and cache the infos to avoid resending an event for the same wait object.
- When starting profiling we do now generate "thread scheduled" events for
the already running threads.
- _user_system_profiler_start(): Check whether the parameters pointer is a
userland address at all.
- The system_profiler_team_added event does now also contain the team's name.
* Added a sem_get_name_unsafe() returning a semaphore's name. It is "unsafe",
since the caller has to ensure that the semaphore exists and continues to
exist as long as the returned name is used.
* Adjusted the "profile" and "scheduling_recorder" according to the system
profiling changes. The latter prints the number of dropped events, now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30345 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed the interface of _kern_system_profiler_start(). The parameters are
passed in a structure now, so it is easier to extend it and ignore unused
parameters.
* One can now select which system profiling events one is interested in.
* Added scheduling events to the system profiling interface. Those are pretty
much the ones recorded when scheduler tracing is enabled. Still missing are
the "wait object" events that allow to interpret what a thread is waiting
for.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30243 a95241bf-73f2-0310-859d-f6bbb57e9c96

The kernel side of a new system-wide sampling-based profiling mechanism.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30127 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented a basic notification mechanism. Right now, only media changes and
device additions/removals can be monitored.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29582 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Made the use of file devices more convenient and complete by adding
the methods IsFile() and GetFilePath() to BDiskDevice, and
BDiskDeviceRoster::GetFileDeviceForPath().
* Added new syscalls to implement this functionality.
* Added new flag B_DISK_DEVICE_IS_FILE.
* Fixed wrong operator precedence assumption in the BDiskDevice class at
several places.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28052 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added syscall _kern_read_kernel_image_symbols() for reading a kernel
image's symbol and string tables.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27687 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented a (private for now) get_system_info_etc() call, that can retrieve
various system information.
* Implemented retrieving some VM stats via this call.
* The VM now maintains a page fault counter, and sets system_info::page_faults
accordingly.
* Added a (pretty simple) "vmstat" command line app.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27597 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Adding msg{rcv,snd,get,ctl} syscalls to the system
* Add message queue init function call to main.cpp


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27417 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed bug in the "scheduler" command: The check when a thread was
unscheduled was incorrect.
* Introduced _kern_analyze_scheduling() syscall. It requires scheduler
kernel tracing to be enabled. It uses the tracing entries for a given
period of time to do a similar analysis the "scheduler" debugger
command does (i.e. number of runs, run time, latencies, preemption
times) for each thread. Additionally the analysis includes for each
thread how long the thread waited on each locking primitive in total.
* Added kernel tracing for the creation of semaphores and initialization
of condition variables, mutexes, and rw locks. The enabling macro is
SCHEDULING_ANALYSIS_TRACING. The only purpose is to provide
_kern_analyze_scheduling() with more info on the locking primitives
(the name in particular).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27304 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented mprotect(). A vm_area does now have an optional array
specifying the protection of each page (4 bits per page).
* Added no-op implementation of posix_madvise().
* Replaced a few "addr_t size" parameters by "size_t size".


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26871 a95241bf-73f2-0310-859d-f6bbb57e9c96

First patch by Salvatore to implement XSI semaphores with a few changes
by myself:
* renamed xsi_do_undo() to xsi_sem_undo() (there is more to XSI than sems).
* Fixed coding style issues in sys/sem.h and xsi_sem.cpp.
* Added _kern_*() syscall prototypes to syscalls.h.
* Added a TODO in xsi_sem.cpp and xsi_semaphore.h about moving union semun to
a shared header.
* Made the team::xsi_sem_undo_requests int32 - due to padding, it would have
needed 4 bytes anyway; please always use specific types over int/short/long.
* xsi_sem_undo() now checks if it needs to do anything - the calls in team.cpp
no longer needs to do this.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26676 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed the _kern_exec() and _kern_load_image() syscalls. They expect
a flattened argument/environment buffer now. This simplifies the work
for the kernel a bit, since it can just copy the buffer and check
whether it looks OK instead of messing around with individual strings.
The runtime loader also gets a flattened array.
* Set the maximum size of the arguments/environment buffer to 128 KB.
When more arguments are passed, we fail with a proper error code
(instead of just truncating the arguments as before).
* On exec*() the first argument was silently replaced by the given path
name, which is not correct.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26119 a95241bf-73f2-0310-859d-f6bbb57e9c96

Removed <syscalls.h>' dependency to <semaphore.h> by giving the sem_t
structure a name.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26015 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added vm_page_write_modified_page_range(), which is similar to
vm_page_write_modified_pages(), save that it only writes pages in the
given range.
* Added vm_page_schedule_write_page_range() which schedules all modified
pages in the given cache's range for writing by the page writer.
* Added _kern_sync_memory() syscall and the msync() POSIX function.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25620 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Introduced new header directory headers/private/system which is supposed
to contain headers shared by kernel and userland (mainly libroot).
* Moved quite a few private kernel headers to the new location. Split
several kernel headers into a shared part and one that is still kernel
private. Adjusted all affected Jamfiles and source in the standard x86
build accordingly. The build for other architectures and for test code
may be broken.
* Quite a bit of userland code still includes private kernel headers.
Mostly those are <util/*> headers. The ones that aren't strictly
kernel-only should be moved to some other place (maybe
headers/private/shared/util).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25486 a95241bf-73f2-0310-859d-f6bbb57e9c96