Implement support for DT_MIPS_RLD_MAP_REL.

ok deraadt@

Make R_MIPS_* defines available via <machine/reloc.h>.

OK guenther@

In exec_elf.c: expand ELFNAME(), ELFNAME2(), and ELFNAMEEND() except
leaving out the size, so that
ELFNAME2(exec,makecmds)
becomes
exec_elf_makecmds
instead of
exec_elf{32,64}_makecmds
and then delete the ELFNAME2() and ELFNAMEEND() macros.

Move the prototypes for functions local to exec_elf.c to there from
exec_elf.h.

Simplify the SMALL_KERNEL conditionals around the ELF coredump code.

Change exec_conf.c to use the size-generic names and macros

Remove exec_elf{32,64}.c and just build exec_elf.c; delete the
_KERN_DO_ELF and _KERN_DO_ELF64 #defines.

ok jca@, encouragement from deraadt@ and tom@

_NLIST_DO_ELF is no longer needed: it's the only option

ok deraadt@

No longer define EXEC_SCRIPT (probably coming from old PefoBSD). Also,
DB_ELFSIZE ought to be defined in <machine/db_machdep.h>, not <machine/exec.h>

Remove the 'OLF method' used for the transition from a.out to ELF and
for all the compat layers which are now gone. Linux compat still works
because it always used another method in any case, and nothing looks at
p_os anymore.
ok jsing

unifdef -D__LP64__

Crank __LDPGSZ from 4KB to 16KB, in preparation for a kernel page size
increase as well.

Binaries compiled before this change will not work once the kernel page size
is cranked (in a few weeks), so you might want to update your userland and
packages soon.

Remove code allowing native binaries with O32 ABI to run, there aren't any...

Move exec.h out from sgi to share it with other mips64 ports; with
a tip from miod@.

ok pefo@ miod@

Make R_MIPS_* defines available via <machine/reloc.h>.

OK guenther@

In exec_elf.c: expand ELFNAME(), ELFNAME2(), and ELFNAMEEND() except
leaving out the size, so that
ELFNAME2(exec,makecmds)
becomes
exec_elf_makecmds
instead of
exec_elf{32,64}_makecmds
and then delete the ELFNAME2() and ELFNAMEEND() macros.

Move the prototypes for functions local to exec_elf.c to there from
exec_elf.h.

Simplify the SMALL_KERNEL conditionals around the ELF coredump code.

Change exec_conf.c to use the size-generic names and macros

Remove exec_elf{32,64}.c and just build exec_elf.c; delete the
_KERN_DO_ELF and _KERN_DO_ELF64 #defines.

ok jca@, encouragement from deraadt@ and tom@

_NLIST_DO_ELF is no longer needed: it's the only option

ok deraadt@

No longer define EXEC_SCRIPT (probably coming from old PefoBSD). Also,
DB_ELFSIZE ought to be defined in <machine/db_machdep.h>, not <machine/exec.h>

Remove the 'OLF method' used for the transition from a.out to ELF and
for all the compat layers which are now gone. Linux compat still works
because it always used another method in any case, and nothing looks at
p_os anymore.
ok jsing

unifdef -D__LP64__

Crank __LDPGSZ from 4KB to 16KB, in preparation for a kernel page size
increase as well.

Binaries compiled before this change will not work once the kernel page size
is cranked (in a few weeks), so you might want to update your userland and
packages soon.

Remove code allowing native binaries with O32 ABI to run, there aren't any...

Move exec.h out from sgi to share it with other mips64 ports; with
a tip from miod@.

ok pefo@ miod@