i386: Put allocated ELF notes in read-only data segment

This changes the i386 linker script and the asm-generic macro it uses so that
ELF note sections with SHF_ALLOC set are linked into the kernel image along
with other read-only data.  The PT_NOTE also points to their location.

This paves the way for putting useful build-time information into ELF notes
that can be found easily later in a kernel memory dump.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index a2b09ed852a..0240e0506a0 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -224,7 +224,11 @@
         }
 
 #define NOTES                                                           \
-        .notes : { *(.note.*) } :note
+        .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
+                VMLINUX_SYMBOL(__start_notes) = .;                      \
+                *(.note.*)                                              \
+                VMLINUX_SYMBOL(__stop_notes) = .;                       \
+        }
 
 #define INITCALLS                                                       \
         *(.initcall0.init)                                              \