The direct execution of application-level code by a watch handler is
troublesome because those handlers are executed at the I/O signal level.
In the concrete case, the watch handler got recursively called because
the handler called _handle_config (application-code), which called the
VFS, which in turn performed a wait_and_dispatch_one_io_signal, which
again invoked the watch handler.
The patch works around the problem by letting the watch notification
trigger the application-level signal for the _config_handler.
Fixes#4091
I created a test program which stresses the interplay between libc,
pthreads and vfs_pipe and may detect regressions.
The program starts a thread that spawns a bunch of workers, sends and
receives data to them through a pipe. When all data of a worker is
collected, the worker is finished (join()) and a new worker is started.
Both the number of bytes sent to the worker and the size of its
answer are random.
Issue #3967
* The device XML information dataspace is only provided,
when the client's policy states `info="yes"`
* The device XM information gets changed to include the
physical resource names (I/O memory and IRQ addresses)
instead of virtual ids and page offset
Fix#4077
As linux drivers may distinguish device configuration by pci subdevice id in
addition to the pci device id, the former must also be used for finding the
matching entry. Otherwise, e.g., the iwlwifi driver might load the wrong
firmware.
Side note: Add break statement to save superfluous iterations after
match was identified.
Fixes genodelabs#4076
This is a follow-up fix for "Streamline platform-device API on ARM".
There is an ambiguity of the 'local_addr' method between the inherited
'Attached_dataspace' and the local declaration, which results in the
double application of the sub-page Range::start.
Issue #4075
This compilation unit contains a global constructor, which violates our
assumption that the libc is free of global constructors on ARMv7.
Specifically, the graphical terminal fails with the following message:
[init -> terminal] Error: Component::construct() returned without executing
pending static constructors (fix by calling
Genode::Env::exec_static_constructors())
[init -> terminal] Error: Uncaught exception of type 'Linker::Fatal'
In this case, the libc-less terminal uses the VFS. The VFS mounts the
ttf VFS plugin. The ttf VFS plugin depends on the libc.
The compilation unit 'arm_initfini.c' can safely be excluded because it
merely initializes the global '_libc_arm_fpu_present' variable, which
is not used by the current version of our libc/libm.
Fixes#4080
This API rework eases the access to memory-mapped I/O registers and
interrupts when using the platform driver. It introduces the notions of
- Platform::Device - one device obtained from a platform session
- Platform::Device::Mmio - locally-mapped MMIO registers of a device
- Platform::Device::Irq - interface for receiving device interrupts
The patch touches several drivers. Some drivers would require a
significant structural change to adopt the new API (e.g., net/virtio,
dde_linux drivers, imx gpio). In these cases, the patch adds
compatibility shims meant to be temporary. In other cases (e.g., imx
i2c), the adaptation was simple enough to carry through.
Fixes#4075
This patch adjusts the matching of the IP address such that the external
IP address is used as opposed the the NAT-local address. It is follow-up
fix of the conversion to the uplink session interface.
Issue #3961
When we allowed symbol resolution during exceptions, we used the shared
object lock to protect ELF object list manipulation (e.g., dlopen,
dclose) when executing exception unwinding code in the linker.
Unfortunately, sometimes libraries that are loaded by 'dlopen' may raise
exceptions in the process, leading to a deadlock within the unwind code.
In order to resolve this, we now protect the object list operations
(i.e., enqueue, removal, iteration) by a separate mutex. This allows
the shared object interface to throw exceptions.
issue #4071
This patch unifies the core-internal 'Mapping' type across all base
platforms.
As one minor downside on seL4, the diagnostic error messages when
observing faults other than page faults no longer print the faulting
thread and PD names.
Issue #2243
These messages pollute the boot log of Sculpt OS when ROM modules are
requested for files of the config fs before the sculpt manager has
created their first version.
When the own cap quota of a client does not suffice for a cap upgrade of
an existing session to a server, the client must issue a cap-resource
request to the parent. This logic was already in place for RAM quota but
was missing for cap quota.
Issue #4072
When callback functions of `dl_iterate_phdr` required further jump slot
relocations this lead to a deadlock. Therefore, we allow the resolution
of further symbols from callback functions, but protect the ELF object
list during the iteration, which blocks any dynamic loading (e.g.,
dlopen/dlcose) of shared object by other threads while in program header
iteration.
fixes#4071
Apparently the skewed motion timings came from the issue fixed by
"timer: restore semantics of periodic timeout 0". With the current
version of the timer, the original motion parameters work just fine.
This patch extends the 'Platform_session::alloc_dma_buffer' interface
with a 'Cache' argument that corresponds to the argument accepted by
'Ram_allocator::alloc', which is used by the platform driver under the
hood.
Since the x86 platform driver used to be hardwired to allocate DMA
buffers as UNCACHED, I adjusted all drivers by specifying the UNCACHED
argument. Right now, this is needed as a hint for core to steer the
allocation of I/O page tables. Once we eliminate the need for such hints
(by introducing an explicit 'Region_map::attach_dma' operation), we can
revisit the drivers individually because cached DMA buffers should
generally be fine on the x86 architecture.
Issue #2243
This change avoids many repetetive Genode:: prefixes, making the code
easier to read. The patch also includes a few consistency fixes
regarding include guards and file headers. It also renames
Platform_device::String to Platform_device::Device:name.
Issue #2243
This patch adds the designated alternative to Dataspace::phys_addr to
the platform-session interface. Under the hood, the platform driver
still calls Dataspace::phys_addr but it should eventuelly become the
only caller before we can abolish this function.
Issue #2243
This commit optimizes the 'Child::resolve_session_request'
implementation by introducing an internal 'Route_model' for quickly
traversing routing rules instead of parsing XML on each session request.
Fixes#4068
This commit replaces the hand-crafted config processing by the use of
the 'List_model' utility. This has the following advantages:
- The parsing follows a common formalism that makes the code
easier to maintain and to understand. Several parts of the code
had to be changed (for the better) to make it fit the list model
approach. E.g., the child states have become more expressive
and logical.
- In the common case, the XML data is traversed only once, which
increases the parsing speed in dynamic scenarios.
- The code becomes easier to optimize. In particular, the patch skips
the re-evaluation of the session routing if no service is affected
by the config change.
The patch also revisits the init test by removing overly long sleep
phases and extending a few sleep phases that were too short when
executing the test on Qemu.
Issue #4068
This patch changes the 'alloc_aligned' interface as follows:
- The former 'from' and 'to' arguments are replaced by a single
'range' argument.
- The distinction of the use cases of regular allocations vs.
address-constrained allocations is now overed by a dedicated
overload instead of relying on a default argument.
- The 'align' argument has been changed from 'int' to 'unsigned'
to be better compatible with 'addr_t' and 'size_t'.
Fixes#4067
