They can be used to mark pages as present/non-present without actually
unmapping them. Marking pages as non-present causes every access to
fault. We can use that for debugging as it allows us to "read protect"
individual kernel pages.
* The vm86 code or the code running in virtual 8086 mode may clobber the
%fs register that we use for the CPU dependent thread local storage
(TLS). Previously the vm86 code would simply restore %fs on exit, but
this doesn't always work. If the thread got unscheduled while running
in virtual 8086 mode and was then rescheduled on a different CPU, the
vm86 exit code would restore the %fs register with the TLS value of
the old CPU, causing anything using TLS in userland to crash later on.
Instead we skip the %fs register restore on exit (as do the other
interrupt return functions) and explicitly update the potentially
clobbered %fs by calling x86_set_tls_context(). This will repopulate
the %fs register with the TLS value for the right CPU. Fixes#8068.
* Made the static set_tls_context() into x86_set_tls_context() and made
it available to others to faciliate the above.
* Sync the vm86 specific interrupt code with the changes from hrev23370,
using the iframe pop macro to properly return. Previously what was
pushed in int_bottom wasn't poped on return.
* Account for the time update macro resetting the in_kernel flag and
reset it to 1, as we aren't actually returning to userland. This
didn't cause any harm though as only the time tracking is using that
flag so far.
* Some minor cleanup.
* AVLTreeMap::_GetKey(): Change return type from const Key& to Key, so
the strategy can do that as well and doesn't have have a Key object in
the node.
* Fix the Auto strategy: It was using the undefined _GetKey() instead
of GetKey().
both:
* Add Previous()/Next().
* Add Insert() version that returns a Node* instead of an Iterator.
* Add Remove() version that takes a Node* instead of a key.
TwoKeyAVLTree:
* Add GetIterator() version that takes an additional Node*, i.e.
initializing an iterator to point to the node.
* Add Iterator::CurrentNode().
This is a tree implementation with elements with primary and secondary
key. The code is a cleaned up version of ramfs's implementation. ramfs
doesn't use this version yet.
* Add support function vfs_get_mount_point(), so a file system can get
its own mount point (i.e. the node it covers). Re-added
fs_mount::covers_vnode for that purpose -- the root node isn't know to
the VFS before the mount() hook returns.
* Add function vfs_bind_mount_directory() which bind-mounts a directory
to another. The Vnode::covers/covered_by mechanism is used, so this
isn't true bind-mounting, but sufficient for what we need ATM and
cheaper as well. The vnodes connected thus aren't tracked yet, which
is needed for undoing the connection when unmounting.
* get_vnode_name(): Don't use dir_read() to read the directory. Since we
have already resolved vnode to the covered vnode, we don't want the
dirents to be "fixed" to refer to the covering nodes. Such a vnode
simply wouldn't be found.
* Introduce Vnode flags for covered and covering. Can be used as a quick
check when one doesn't already hold sVnodeLock.
* Rename resolve_mount_point_to_volume_root() to
resolve_vnode_to_covering_vnode().
* Adjust all code that deals with transitions between mount points and
volume root vnodes to generally support covered/covering vnodes.
CFE is used in the upcoming Amiga X-1000 dualcore PPC board.
* Largely inspired by the OF and U-Boot code.
* Still largely stubbed out.
* The loader builds but I don't have a machine to test it. Anyone interested?
of the slab code. It is generic as it only contains the link to a tracing entry
and not any application specific info.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43188 a95241bf-73f2-0310-859d-f6bbb57e9c96
While structs looked cleaner at first sight, it didn't really was any simpler.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43140 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Turn VMCache::consumers C list into a DoublyLinkedList.
* Use object caches for the different VMCache types and the VMCacheRefs.
The purpose is to reduce slab area fragmentation.
* Requires the introduction of a pure virtual VMCache::DeleteObject()
method, implemented in the derived classes.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43133 a95241bf-73f2-0310-859d-f6bbb57e9c96
template function object_cache_delete() to be used to delete objects
constructed with it.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43132 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Introduce TracingMetaData::IsInBuffer() to validate that a certain memory
range is within the valid tracing buffer limits.
* Use that when validating in tracing_is_entry_valid() before trying to access
the entry, resolving a TODO.
* Validate the candidate time against the handed in time (if specified) as an
additional check.
* Tiny unrelated text cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43116 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Add TraceOutput::PrintArgs(), a va_list version of Print().
* Move code of TraceOutput::Print() to new private template function
print_stack_trace().
* Add public tracing_print_stack_trace().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43085 a95241bf-73f2-0310-859d-f6bbb57e9c96
Add helper macros for placing markers in the source, so we can get the
address ranges of code we're interested in.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43071 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Move struct tracing_stack_trace to tracing.h header.
* Add tracing_find_caller_in_stack_trace(). Helper function to get the
first return address of a stack trace that is not in one of the given
address ranges.
* Add AbstractTracingEntryWithStackTrace::StackTrace() getter.
* Add tracing_is_entry_valid(). Checks, based on the additionally given
time, whether a tracing entry is (probably) still in the tracing
buffer.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43070 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Introduce "paranoid" malloc/free into the slab allocator (initializing
allocated memory to 0xcc and setting freed memory to 0xdeadbeef).
* Allow for optional stack traces for slab object cache tracing.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43046 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Add an AbstractTraceEntryWithStackTrace that includes stack trace handling.
* Add a selector macro/template combo to conveniently select the right base
class depending on whether stack traces are enabled or not.
* Minor style cleanups.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43045 a95241bf-73f2-0310-859d-f6bbb57e9c96
Add a DoublyLinkedList::Contains() method to check if a list contains a certain
element.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43043 a95241bf-73f2-0310-859d-f6bbb57e9c96
be used to mark certain io interrupt vectors as reserved and to allocate from
the still free ones. It is a kernel private API for now though.
* Make the MSI code use that functionality instead of implementing its own which
slims it down considerably and also removes quite a bit of hardcoded knowledge
about the interrupt layout that didn't really belong there.
* Mark the various in-use interrupts as reserved from the components that
actually know about them (PIC, IO-APIC, SMP, APIC timer and interrupt setup).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42832 a95241bf-73f2-0310-859d-f6bbb57e9c96
to a panic at boot.
* Make the panic message more explicit when there is no more room left.
This should hopefully fix#7869.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42715 a95241bf-73f2-0310-859d-f6bbb57e9c96
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
* Rename of_support.h/cpp back to support.cpp as per Axel
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42498 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Rename a few variables to make more sense
* OF_FAILED is a signed int.. fix return of of_address_cells
* OF_FAILED is a signed int.. fix return of of_size_cells
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42497 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Add header file to support of_support.cpp
* Add support functions to obtain address and size cell lengths
* Small style cleanups
* Add support for G5 PowerPC cpus...
* Refactor memory region code to be aware of 64-bit OF addresses.
As-is the boot loader wouldn't start on G5 systems because
OpenFirmware memory base addresses are stored as two 32-bit
unsigned int 'cells' vs one 32-bit unsigned int 'cell' on G3/G4.
I removed the static struct and replaced it with a template
and pass uint32 or uint64 depending on the address cell size.
Thanks for the idea DeadYak!
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42486 a95241bf-73f2-0310-859d-f6bbb57e9c96
exit info with some generic status.
* team_create_thread_start(), common_thread_entry(): Initializes the team's
exit info (if that's the main thread) before calling thread_exit(). Fixes
#7686.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42183 a95241bf-73f2-0310-859d-f6bbb57e9c96
partition_module_info::uninitialize().
* Implemented the hook for BFS.
* Implemented KFileSystem::Uninitialize().
Fixes failure to initialize a BFS initialized device with an intel partition
map.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42142 a95241bf-73f2-0310-859d-f6bbb57e9c96
destroy the partitioning system's on-disk structure.
* Adjusted the existing partitioning system implementations accordingly.
Actually implemented the hook for the intel partitioning system.
* Added Uninitialize() method to KDiskSystem and KPartitioningSystem. The latter
implements the method calling the new module hook.
* _user_uninitialize_partition(): Also let the disk system uninitialize the
on-disk structure.
This fixes the failure to initialize a disk device with BFS, when it contains a
valid partition map with at least one partition.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42140 a95241bf-73f2-0310-859d-f6bbb57e9c96
its size.
* Added "Display current boot loader log" item to the "Debug Options" boot
loader menu. It displays what the boot loader has logged so far. Might be
interesting for early boot issues when serial debugging is not possible.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42134 a95241bf-73f2-0310-859d-f6bbb57e9c96
* If we detect ACPI 2.0 or higher, the spec says we should use the XSDT rather
than the RSDT. Attempt to do so, falling back to the RSDT if the former fails
to be mapped/validated.
* Refactored acpi_find_table into a templated version to account for the fact
that the XSDT exports different pointer widths for its links to other tables
than the RSDT.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42133 a95241bf-73f2-0310-859d-f6bbb57e9c96
which don't wait for a character, but return -1 when no character is
available ATM. Implemented correctly for x86 only.
* Changed the semantics of the debugger_module_info::debugger_getchar() hook.
It is supposed to return immediately now.
* Adjusted usb_keyboard accordingly. Hacked UHCI's debug_process_transfer() to
achieve that. It does now start, check, or cancel a transfer. Split
UHCI::ProcessDebugTransfer() into StartDebugTransfer(), and
CheckDebugTransfer() accordingly, and also added a CancelDebugTransfer().
The latter seems to have issues. Michael, please have a look. I have no clue
what I'm doing. :-)
* Adjusted kgetc() to poll all possible inputs using the new
functions/semantics. This allows to use any input (USB, PS/2, serial) in KDL.
* Removed the no longer needed "serial_input" command.
* read_line(): Also support 0x7f as backspace code. That's what xterm sends.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42126 a95241bf-73f2-0310-859d-f6bbb57e9c96
* 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
* Added an arch_debug_gdb_get_registers() interface that is supposed to provide
the register values in the format expected by gdb and implemented it for x86.
* Reimplemented gdb_regreply() to use that. Also made it buffer overflow safe.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41880 a95241bf-73f2-0310-859d-f6bbb57e9c96
