Make sure the syscall table entries are aligned on a 4-byte boundary.
Required for strict-alignment architectures and a good idea on others.

ok deraadt@

arm just had to be different and change the syntax for .pushsection
arguments, so we have to cope.

Populate the non-LOAD openbsd.syscalls section (and PT_OPENBSD_SYSCALL)
with {uint offset, uint syscall#} entries in libc & ld.so.
In libc a few syscall# entries (break, sigprocmask, _tfork, _threxit

Populate the non-LOAD openbsd.syscalls section (and PT_OPENBSD_SYSCALL)
with {uint offset, uint syscall#} entries in libc & ld.so.
In libc a few syscall# entries (break, sigprocmask, _tfork, _threxit)
are duplicated because additional or inline uses occur (that situation
is handled elsewhere)
ok kettenis

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Add ENTRY_NB() macro for doing an ASM function entry without setting
the binding to global (NB == "no binding"), as clang 13 is now
warning about changing the binding from global to weak.

This first

Add ENTRY_NB() macro for doing an ASM function entry without setting
the binding to global (NB == "no binding"), as clang 13 is now
warning about changing the binding from global to weak.

This first pass does amd64 and sparc64 and pulls DEFS.h out of the
per-arch directory to a common directory; others to follow

ok kettenis@

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