Change our ELF binary branding to something more acceptable to the Binutils

maintainers.

After we established our branding method of writing upto 8 characters of
the OS name into the ELF header in the padding; the Binutils maintainers
and/or SCO (as USL) decided that instead the ELF header should grow two new
fields -- EI_OSABI and EI_ABIVERSION.  Each of these are an 8-bit unsigned
integer.  SCO has assigned official values for the EI_OSABI field.  In
addition to this, the Binutils maintainers and NetBSD decided that a better
ELF branding method was to include ABI information in a ".note" ELF
section.

With this set of changes, we will now create ELF binaries branded using
both "official" methods.  Due to the complexity of adding a section to a
binary, binaries branded with ``brandelf'' will only brand using the
EI_OSABI method.  Also due to the complexity of pulling a section out of an
ELF file vs. poking around in the ELF header, our image activator only
looks at the EI_OSABI header field.

Note that a new kernel can still properly load old binaries except for
Linux static binaries branded in our old method.

  *
  * For a short period of time, ``ld'' will also brand ELF binaries
  * using our old method.  This is so people can still use kernel.old
  * with a new world.  This support will be removed before 5.0-RELEASE,
  * and may not last anywhere upto the actual release.  My expiration
  * time for this is about 6mo.
  *

1 files changed, 3 insertions, 1 deletions

diff --git a/usr.bin/brandelf/Makefile b/usr.bin/brandelf/Makefile
index 81d0039..8767913 100644
--- a/usr.bin/brandelf/Makefile
+++ b/usr.bin/brandelf/Makefile
@@ -1,4 +1,6 @@
+# $FreeBSD$
+
 PROG=	brandelf
-CFLAGS+=-Wall
+CFLAGS+= -Wall
 
 .include <bsd.prog.mk>