linux-kernel - [PATCH 1/7] i386: Put allocated ELF notes in read-only data segment

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20070711185744.B10014D0555@magilla.localdomain>
Date:	Wed, 11 Jul 2007 11:57:44 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 1/7] 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@...hat.com>
---
 arch/i386/kernel/vmlinux.lds.S    |    6 +++---
 include/asm-generic/vmlinux.lds.h |    6 +++++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S
index aa87b06..f5b1db5 100644
--- a/arch/i386/kernel/vmlinux.lds.S
+++ b/arch/i386/kernel/vmlinux.lds.S
@@ -60,7 +60,9 @@ SECTIONS
   	__stop___ex_table = .;
   }
 
-  BUG_TABLE
+  NOTES :text :note
+
+  BUG_TABLE :text
 
   . = ALIGN(4);
   .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {
@@ -206,6 +208,4 @@ SECTIONS
   STABS_DEBUG
 
   DWARF_DEBUG
-
-  NOTES
 }
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 84155eb..d86c929 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)						\
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/