Guarding code with #ifdef's makes even cursor testing of 'does this code compile'
difficult due to code being hidden by the pre-processor. Using config_set in
regular C if statements is performant as the compiler can trivially detect
dead code at compile time, and at -O1 and above will not even link in symbols
referenced by dead code in these blocks, so this will not bloat image size
This commit deprecates seL4_ReplyWait, removes seL4_NBwait completely,
and changes the return type of seL4_Wait to void (seL4_Wait should be
used for notification objects, and seL4_Recv should be used where
seL4_Wait was used previously for endpoints).
The 'WithMRs' variants of the syscall stubs are known to be broken
on ARM with GCC at -O0. This commit prevents the generation and
usage of these stubs when -O0 is set in the common tool configuration
options.
Due to limitations in specifying Kconfig constraints, and to preserve
the existing meaning of the Kconfig variables, the 'LIB_SEl4_STUBS_USE_IPC_BUFFER_ONLY'
config variable has to be duplicated with two variants, one for use
when the user is free to pick either and one hidden for when selection
has to be forced. Also to prevent the sub options from not appearing
in the libsel4 submenu I had to change libsel4 to be a 'true' menu
instead of a 'menuconfig'
This commit closes SELFOUR-187
There are now separate libs for benchmark, assert, printf, putchar
start/stop:
libs/libsel4benchmark
libs/libsel4assert
libs/libsel4printf
libs/libsel4putchar
libs/libsel4startstop
The primary changes are introducing sel4/sel4.h and removing std* types
plus porting assert and IO code from the kernel to libsel4assert,
libsel4printf, libsel4putchar.
This means the code within libsel4 and the newlibs do not overload any
typical libc entities. Instead the libraries use types like
seL4_Uint32 ... instead of uint32_t. And printf is now seL4_Printf and
assert is seL4_Assert ....
Finally, the only file modified that effects kernel code is
kernel/tools/bitfield_gen.py. It needed to be modified as it generates
files for both kernel and user space. And for user space the generated code
(types_gen.h) needed to use the new types and asserts. The changes should
not change what is generated for the kernel and I did a comparison of
kernel_final.{c|s} before and after my change and the only differences
were time stamps.
Bug: #15 Streamline kernel/libsel4 and remove its libc dependencies
IA32 is 32bit version of the x86 architecture. Whilst only IA32
is supported, much of the code is generic x86. Using a generic
x86 architecture will aid in future 64bit support
Without a name, this struct (and its typedef) comes out as an anonymous type
when imported into Isabelle. This makes it difficult to automate proofs of
functions that use this type.
See also JIRA VER-434
This commit involves the PAE paging itself, refactoring the
vspace code to extra what is common between PAE and 32bit paging,
as well as some renaming to not call the root paging structure
a PD
A C++ compiler will attempt to interpret 'return info' as an invocation of a copy
constructor. Even though the copy constructor is auto-generated (and eventually
completely eliminated due to inlining) and just does obvious member copying it
still results in an intermediate invocation that must take a reference to 'info'.
Because 'info' is a register variable it is not permissable to take a reference
to it. Manually reconstructing a new info from the .words keeps everything as
Plain Old Data
