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@

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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Simplify __cerror now that %r27 is always the TCB pointer.
Don't need a PLT relocation for __cerror.
Move macros for doing internal aliases in ASM from SYS.h to DEFS.h

__cerror tweaks by Miod Vallat

Simplify __cerror now that %r27 is always the TCB pointer.
Don't need a PLT relocation for __cerror.
Move macros for doing internal aliases in ASM from SYS.h to DEFS.h

__cerror tweaks by Miod Vallat, testing by aoyama@

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$OpenBSD$

correted sigsetjmp, setjump. Fixed MACHINE_ARCH vs. MACHINE stuff.