Add assembly definitions for amd64 paging.

Merge remote-tracking branch 'fossy/fgets-eof'

Fix fgets behaviour when EOF reached

Typically fgets returns NULL when EOF occus and no characters have been
read. Align this behaviour with POSIX impls.

Fix armv7l bug and added support for 1_000_000 number strings

Add support for truncating open files.

uefi: chdir: return -1 if path does not exist.

cp from mescc-tools-extra relies on this.

ensure needed libraries are read first

A very rough prototype for strstr

Another dummy file

Move the utsname struct definition to the proper place so that we
don't have duplication

Merge branch 'main' of github.com:oriansj/M2libc

Add dummy stdint.h

Merge pull request #56 from rick-masters/fix-sal-encoding

Fix sal_eax,cl and sal_rax,cl encoding.

Fix sal_eax,cl and sal_rax,cl encoding.

Add UEFI task priority level defines.

Add non-trivial access function to UEFI.

Fix file opening modes in UEFI (== has higher precedence than | )

Remove /./ from paths rather than convert them to ///.

Improve handling of relative paths in UEFI.

Fix UEFI calling convention.

* Stack should be aligned to 16 bytes
* UEFI shadow stack space should be 32 bytes even for functions with less than 4 arguments
* Non-volatile registers must be restored before the program exist