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authorTim Abbott <tabbott@MIT.EDU>2009-04-25 22:10:56 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-26 09:20:38 -0700
commitc80d471a476b6d6fe0bc1fd25293c24c66b7aaaf (patch)
treee7e6cf35915186c614728dadbd95c5197bff0075 /include
parent0c8454f56623505a99463405fd7d5664adfbb094 (diff)
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Add new HEAD_TEXT_SECTION macro.
This patch is preparation for replacing all uses of ".head.text" or ".text.head" in the kernel with macros, so that the section name can later be changed without having to touch a lot of the kernel. Since some linker scripts do more complex things than referencing HEAD_TEXT, we add a HEAD_TEXT_SECTION macro that just contains the actual name. I've defined HEAD_TEXT_SECTION in a new header, include/linux/section-names.h, so that this section name only needs to appear in one place. I anticipate creating similar macro structures for a number of other section names. 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 ".text.foo". Signed-off-by: Tim Abbott <tabbott@mit.edu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/vmlinux.lds.h4
-rw-r--r--include/linux/init.h4
-rw-r--r--include/linux/section-names.h6
3 files changed, 12 insertions, 2 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 7fa660fd449..eaa06ef6f7d 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -1,3 +1,5 @@
+#include <linux/section-names.h>
+
#ifndef LOAD_OFFSET
#define LOAD_OFFSET 0
#endif
@@ -331,7 +333,7 @@
#endif
/* Section used for early init (in .S files) */
-#define HEAD_TEXT *(.head.text)
+#define HEAD_TEXT *(HEAD_TEXT_SECTION)
/* init and exit section handling */
#define INIT_DATA \
diff --git a/include/linux/init.h b/include/linux/init.h
index f121a7a10c3..20a1334e34e 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -2,6 +2,8 @@
#define _LINUX_INIT_H
#include <linux/compiler.h>
+#include <linux/section-names.h>
+#include <linux/stringify.h>
/* These macros are used to mark some functions or
* initialized data (doesn't apply to uninitialized data)
@@ -107,7 +109,7 @@
#define __memexitconst __section(.memexit.rodata)
/* For assembly routines */
-#define __HEAD .section ".head.text","ax"
+#define __HEAD .section __stringify(HEAD_TEXT_SECTION),"ax"
#define __INIT .section ".init.text","ax"
#define __FINIT .previous
diff --git a/include/linux/section-names.h b/include/linux/section-names.h
new file mode 100644
index 00000000000..c956f4eb2ad
--- /dev/null
+++ b/include/linux/section-names.h
@@ -0,0 +1,6 @@
+#ifndef __LINUX_SECTION_NAMES_H
+#define __LINUX_SECTION_NAMES_H
+
+#define HEAD_TEXT_SECTION .head.text
+
+#endif /* !__LINUX_SECTION_NAMES_H */