o Convert more absolute symbols to section relative to keep the theme in
vmlinux.lds.S file and to avoid problem if kernel is relocated.
o Also put a message so that in future people can be aware of it and
avoid introducing absolute symbols.
Signed-off-by: Vivek Goyal <[email protected]>
---
arch/i386/kernel/vmlinux.lds.S | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff -puN arch/i386/kernel/vmlinux.lds.S~i386-reloc-convert-more-abs-syms-to-section-relative arch/i386/kernel/vmlinux.lds.S
--- linux-2.6.19-rc5-mm1-reloc/arch/i386/kernel/vmlinux.lds.S~i386-reloc-convert-more-abs-syms-to-section-relative 2006-11-08 16:24:31.000000000 -0500
+++ linux-2.6.19-rc5-mm1-reloc-root/arch/i386/kernel/vmlinux.lds.S 2006-11-08 16:29:51.000000000 -0500
@@ -2,6 +2,12 @@
* Written by Martin Mares <[email protected]>;
*/
+/* Don't define absolute symbols until and unless you know that symbol
+ * value is should remain constant even if kernel image is relocated
+ * at run time. Absolute symbols are not relocated. If symbol value should
+ * change if kernel is relocated, make the symbol section relative and
+ * put it inside the section definition.
+ */
#define LOAD_OFFSET __PAGE_OFFSET
#include <asm-generic/vmlinux.lds.h>
@@ -63,11 +69,11 @@ SECTIONS
CONSTRUCTORS
} :data
- __start_paravirtprobe = .;
.paravirtprobe : AT(ADDR(.paravirtprobe) - LOAD_OFFSET) {
+ __start_paravirtprobe = .;
*(.paravirtprobe)
+ __stop_paravirtprobe = .;
}
- __stop_paravirtprobe = .;
. = ALIGN(4096);
.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
@@ -163,11 +169,11 @@ SECTIONS
*(.altinstr_replacement)
}
. = ALIGN(4);
- __start_parainstructions = .;
.parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
+ __start_parainstructions = .;
*(.parainstructions)
+ __stop_parainstructions = .;
}
- __stop_parainstructions = .;
/* .exit.text is discard at runtime, not link time, to deal with references
from .altinstructions and .eh_frame */
.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
_
-
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