x86: x86 core dump TLS

This makes ELF core dumps of 32-bit processes include a new
note type NT_386_TLS (0x200) giving the contents of the TLS
slots in struct user_desc format.  This lets post mortem
examination figure out what the segment registers mean like
the debugger does with get_thread_area on a live process.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/linux/elf.h b/include/linux/elf.h
index 576e83b..7ceb24d 100644
--- a/include/linux/elf.h
+++ b/include/linux/elf.h
@@ -355,6 +355,7 @@
 #define NT_AUXV		6
 #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
 #define NT_PPC_VMX	0x100		/* PowerPC Altivec/VMX registers */
+#define NT_386_TLS	0x200		/* i386 TLS slots (struct user_desc) */
 
 
 /* Note header in a PT_NOTE section */