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[PATCH] i386: Convert more absolute symbols to section relative

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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 <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
This commit is contained in:
Vivek Goyal 2006-12-07 02:14:10 +01:00 committed by Andi Kleen
parent 2c22d8baa9
commit 79929fd1c1
1 changed files with 10 additions and 4 deletions
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14
arch/i386/kernel/vmlinux.lds.S
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@ -8,6 +8,12 @@
* put it inside the section definition.
*/
/* 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>
@ -65,11 +71,11 @@ 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) {
@ -172,11 +178,11 @@ 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) }