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x86: convert compressed loader to use __HEAD and HEAD_TEXT macros.

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This has the consequence of changing the section name use for head
code from ".text.head" to ".head.text".

Linus suggested that we merge the ".text.head" section with ".text"
(presumably while preserving the fact that the head code starts at 0).
When I tried this it caused the kernel to not boot.

Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Tim Abbott 2009-09-16 16:44:27 -04:00 committed by H. Peter Anvin
parent d223246ef7
commit 1dc818c1c5
3 changed files with 8 additions and 4 deletions
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3
arch/x86/boot/compressed/head_32.S
View File

@ -23,13 +23,14 @@
*/
.text
#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/segment.h>
#include <asm/page_types.h>
#include <asm/boot.h>
#include <asm/asm-offsets.h>
.section ".text.head","ax",@progbits
__HEAD
ENTRY(startup_32)
cld
/*

3
arch/x86/boot/compressed/head_64.S
View File

@ -24,6 +24,7 @@
.code32
.text
#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/segment.h>
#include <asm/pgtable_types.h>
@ -33,7 +34,7 @@
#include <asm/processor-flags.h>
#include <asm/asm-offsets.h>
.section ".text.head"
__HEAD
.code32
ENTRY(startup_32)
cld

6
arch/x86/boot/compressed/vmlinux.lds.S
View File

@ -1,3 +1,5 @@
#include <asm-generic/vmlinux.lds.h>
OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT)
#undef i386
@ -18,9 +20,9 @@ SECTIONS
* address 0.
*/
. = 0;
.text.head : {
.head.text : {
_head = . ;
*(.text.head)
HEAD_TEXT
_ehead = . ;
}
.rodata.compressed : {