Reduce inclusion of limits.h as much as possible at the same time.
This does mean that kmalloc.h is now including Kernel/API/POSIX/limits.h
instead of LibC/limits.h, but the scope could be limited a lot more.
Basically every file in the kernel includes kmalloc.h, and needs the
limits.h include for PAGE_SIZE.
The file `limits.h` had definitions for x86. This PR removes these
definitions and fixes the upper limit for the type ssize_t which was
defined to be 0x7fffffff.
Some programs explicitly ask for a different initial stack size than
what the OS provides. This is implemented in ELF by having a
PT_GNU_STACK header which has its p_memsz set to the amount that the
program requires. This commit implements this policy by reading the
p_memsz of the header and setting the main thread stack size to that.
ELF::Image::validate_program_headers ensures that the size attribute is
a reasonable value.
posix1_lim.h only defines macros that start with _POSIX_*, and don't
mention anything that might be defined in limits.h. Likewise, limits.h
uses none of the _POSIX_* macros. Thus, it is okay to change the order
of imports.
This patch adds the NGROUPS_MAX constant and enforces it in
sys$setgroups() to ensure that no process has more than 32 supplementary
group IDs.
The number doesn't mean anything in particular, just had to pick a
number. Perhaps one day we'll have a reason to change it.
POSIX defines this as the "Maximum number of bytes supported for the
name of a timezone (not of the TZ variable)." It must have a minimum
value of _POSIX_TZNAME_MAX (6). The longest time zone name in the TZDB
is about 40 chars, so 64 is chosen here for a little wiggle room, and
to round up to a power of 2.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
GCC installs a fixed version of the <limits.h> header as per https://gcc.gnu.org/onlinedocs/gcc/Fixed-Headers.html.
The fixed header doesn't include the target's <limits.h> which in turn means that some definitions (such as PATH_MAX)
aren't available. This change requires rebuilding the toolchain (Toolchain/BuildIt.sh).
This fixes the flatbuffers port.
The commit also removes some non-standard defines (U*_MIN) which don't appear to be used
anywhere. By definition they're always 0 though so they're not strictly necessary.
