Collect .openbsd.syscalls sections into a new PT_OPENBSD_SYSCALLS segment.
This will be used soon to pin system calls to designated call sites.

ok deraadt@

merge llvm-16.0.6

Implement support for PT_OPENBSD_NOBTCFI in lld(1). This can be set using
the -z nobtcfi option.

ok deraadt@

In the linkers, collect objects in section "openbsd.mutable" and place
them into a page-aligned region in the bss, with the right markers for
kernel/ld.so to identify the region and skip making it immutable.
While here, fix readelf/objdump versions to show all of this.
ok miod kettenis

branches: 1.1.1;
Initial revision

merge llvm-16.0.6

Implement support for PT_OPENBSD_NOBTCFI in lld(1). This can be set using
the -z nobtcfi option.

ok deraadt@

In the linkers, collect objects in section "openbsd.mutable" and place
them into a page-aligned region in the bss, with the right markers for
kernel/ld.so to identify the region and skip making it immutable.
While here, fix readelf/objdump versions to show all of this.
ok miod kettenis

branches: 1.1.1;
Initial revision

Implement support for PT_OPENBSD_NOBTCFI in lld(1). This can be set using
the -z nobtcfi option.

ok deraadt@

In the linkers, collect objects in section "openbsd.mutable" and place
them into a page-aligned region in the bss, with the right markers for
kernel/ld.so to identify the region and skip making it immutable.
While here, fix readelf/objdump versions to show all of this.
ok miod kettenis

branches: 1.1.1;
Initial revision

In the linkers, collect objects in section "openbsd.mutable" and place
them into a page-aligned region in the bss, with the right markers for
kernel/ld.so to identify the region and skip making it immutable.
While here, fix readelf/objdump versions to show all of this.
ok miod kettenis

branches: 1.1.1;
Initial revision