Patchwork [2/6] Add new NOSAVE_DATA linker script macro.

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Submitter Tim Abbott
Date April 30, 2009, 7:32 p.m.
Message ID <1241119956-31453-3-git-send-email-tabbott@mit.edu>
Download mbox | patch
Permalink /patch/26709/
State Superseded
Headers show

Comments

Tim Abbott - April 30, 2009, 7:32 p.m.
This patch is preparation for replacing most ".data.nosave" in the
kernel with macros, so that the section name can later be changed
without having to touch a lot of the kernel.

The long-term goal here is to be able to change the kernel's magic
section names to those that are compatible with -ffunction-sections
-fdata-sections.  This requires renaming all magic sections with names
of the form ".data.foo".

Signed-off-by: Tim Abbott <tabbott@mit.edu>
Cc: Sam Ravnborg <sam@ravnborg.org>
---
 include/asm-generic/vmlinux.lds.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

Patch

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 3d88c87..f5ebd2b 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -124,6 +124,13 @@ 
 	. = ALIGN(PAGE_SIZE);						\
 	*(.bss.page_aligned)
 
+#define NOSAVE_DATA							\
+	. = ALIGN(PAGE_SIZE);						\
+	__nosave_begin = .;						\
+	*(.data.nosave)							\
+	. = ALIGN(PAGE_SIZE);						\
+	__nosave_end = .;
+
 #define RO_DATA(align)							\
 	. = ALIGN((align));						\
 	.rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {		\