The version string was generated when core/main.cc was rebuilt, which
happens on changes in the file itself or in a header file it includes.
But, the version should reflect if the Genode repository was changed at
any place. Therefore, I moved the version string to its own version.cc
which is forcedly rebuilt any time core is examined by the build system.
@nfeske what do you think about it? Core is now relinked on any build.
Fixes#551.
Turn Genode user-level spinlock into a user-level "helpinglock". This requires
support by the kernel introduced with kernel branch r5.
The commit avoids live-locks when multiple threads with SCs on different
priority levels compete for the same user-level Genode "spinlock".
Issue #986
Set cpu_session default affinity space already during
construction of the thread, so that main thread is placed in the cpu affinity
space as defined by the parent. Otherwise the main thread is placed potentially
outside the affinity space, typically on the first/boot CPU.
Fixes#1107
Reserve first bit in bit allocator for main thread of context allocator and
remove special cases in context allocator. Without the reservation there is
is one context outside the context area allocated.
Fixes#1100
* Core_mem_allocator: implement Range_allocator interface
* Core_mem_allocator: allocate with page-granularity only
* Use slab allocators in core where meaningful (e.g. dataspace objects)
This is normally needed in LDSO and was previously done by the LDSO specific crt0.s.
I forgot to keep it during the unification of the different crt0s.
fix#1077
The destructor of the Area object uses invalid caps which results in
a wanted abort of the process on nova. This is mainly the case in forked
process in noux.
This function provides a way to request the size of an previously
allocated block. It is useful to to ease the implementation of realloc
functionality based on Allocator_avl.
All the pre- and post-processing of the startup lib around the main
function of a dynamic program is now done by LDSO. Hence LDSO directly
calls the main function of the program.
Issue #1042
As the initial main-thread stack is not used for the whole main-thread life
anymore but only for the initialization of the Genode environment it can be
downsized to 32Kb for all architectures.
ref #989
For a main thread a thread object is created by the CRT0 before _main gets
called so that _main can already run in a generic environment that, e.g.,
catches stack overflows as a page-fault instead of corrupting the BSS.
Additionally dynamic programs have only one CRT0 - the one of the LDSO -
which does the initialization for both LDSO and program.
ref #989
The x86_64 ABI requires the stack pointer to be 16-byte aligned before the
call of a function and decreased by 8 at the function entrypoint (after
the return address has been pushed to the stack).
Currently, when a new Genode thread gets created, the initial stack
pointer is aligned to 16 byte. On Genode/Linux, the thread entry function
is entered by a 'call' instruction, so the stack pointer alignment at the
function entrypoint is correct. On Fiasco.OC and NOVA, however, the thread
entry function gets executed without a return address being pushed to the
stack, so at the function entrypoint the stack pointer is still aligned to
16 byte, which can cause problems with compiler-generated SSE
instructions.
With this patch, the stack pointer given to a new thread gets aligned to
16 bytes and decreased by 8 by default, since most of the currently
supported base platforms execute the thread entry function without pushing
a return address to the stack. For base-linux, the stack pointer gets
realigned to 16 bytes before the thread entry function gets called.
Fixes#1043.
Delete operators with additional allocator reference/pointer parameters
are needed if the constructor of an 'new(allocator)' allocated object
throws an exception. Also, destroy now uses the operator to free memory
and provides variants with allocator reference and pointer.
The commit includes a simple test scripts 'run/new_delete', which
exercises the several 'delete' cases.
Related to #1030.
Use a bit allocator for the allocation management of thread contexts,
instead of holding allocation information within the Thread_base objects,
which lead to race conditions in the past.
Moreover, extend the Thread_base class interface with the ability to
to add additional stacks to a thread, and associate the context they're
located in with the corresponding Thread_base object. Additional stacks
can be used to do user-level scheduling with stack switching, without breaking
Genode's API.
Fixes#1024Fixes#1036
Splitting the new Genode::Deallocator interface from the former
Genode::Allocator interface enables us to restrict the accessible
operations for code that is only supposed to release memory, but not
perform any allocations.
Additionally, this patch introduces variants of the 'new' operator
that takes a reference (as opposed to a pointer) to a Genode::Allocator
as argument.
I have no idea where the previous default alignment = 2 in the unsynchronized
singleton came from but as at least the Arndale IC-driver in base-hw needs an
alignment of 4 = address width, unmanaged singleton now uses sizeof(addr_t)
as default alignment.
ref #989
An unmanaged singleton is a singleton object that isn't
constructed or destructed implicitly through the C++ runtime
enviroment. The new header provides a helper to create such objects
and is located in src/base/include.
ref #989
With 64K stack size, when doing 'make core' in noux on base-hw, the main thread
of /libexec/gcc/arm-elf-eabi/4.7.2/cc1plus runs into a stack overflow during
the compilation of core/main.o . Thus raise the stack size to 128K.
fix#964
