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linux-sg2042
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uml: use PAGE_SIZE in linker scripts 

This patch includes page.h header into linker scripts that allow us to
use PAGE_SIZE macro instead of numeric constant.

To be able to include page.h into linker scripts page.h is needed for
some modification - i.e.  we need to use __ASSEMBLY__ and _AC macro

[jdike@linux.intel.com - fixed conflict with as-layout.h]
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cyrill Gorcunov 2008-05-12 14:01:56 -07:00 committed by Linus Torvalds
parent 6d0742426c
commit a7dfa9403b
4 changed files with 26 additions and 19 deletions
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14
arch/um/include/as-layout.h
View File

@ -23,16 +23,16 @@
*/
#ifdef __ASSEMBLY__
#define _AC(X, Y) (Y)
#define _UML_AC(X, Y) (Y)
#else
#define __AC(X, Y) (X (Y))
#define _AC(X, Y) __AC(X, Y)
#define __UML_AC(X, Y) (X(Y))
#define _UML_AC(X, Y) __UML_AC(X, Y)
#endif
#define STUB_START _AC(, 0x100000)
#define STUB_CODE _AC((unsigned long), STUB_START)
#define STUB_DATA _AC((unsigned long), STUB_CODE + UM_KERN_PAGE_SIZE)
#define STUB_END _AC((unsigned long), STUB_DATA + UM_KERN_PAGE_SIZE)
#define STUB_START _UML_AC(, 0x100000)
#define STUB_CODE _UML_AC((unsigned long), STUB_START)
#define STUB_DATA _UML_AC((unsigned long), STUB_CODE + UM_KERN_PAGE_SIZE)
#define STUB_END _UML_AC((unsigned long), STUB_DATA + UM_KERN_PAGE_SIZE)
#ifndef __ASSEMBLY__

7
arch/um/kernel/dyn.lds.S
View File

@ -1,4 +1,5 @@
#include <asm-generic/vmlinux.lds.h>
#include <asm/page.h>
OUTPUT_FORMAT(ELF_FORMAT)
OUTPUT_ARCH(ELF_ARCH)
@ -21,7 +22,7 @@ SECTIONS
_einittext = .;
}
. = ALIGN(4096);
. = ALIGN(PAGE_SIZE);
/* Read-only sections, merged into text segment: */
.hash : { *(.hash) }
@ -68,9 +69,9 @@ SECTIONS
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
. = ALIGN(4096);
. = ALIGN(PAGE_SIZE);
} =0x90909090
. = ALIGN(4096);
. = ALIGN(PAGE_SIZE);
.syscall_stub : {
__syscall_stub_start = .;
*(.__syscall_stub*)

7
arch/um/kernel/uml.lds.S
View File

@ -1,4 +1,5 @@
#include <asm-generic/vmlinux.lds.h>
#include <asm/page.h>
OUTPUT_FORMAT(ELF_FORMAT)
OUTPUT_ARCH(ELF_ARCH)
@ -26,7 +27,7 @@ SECTIONS
INIT_TEXT
_einittext = .;
}
. = ALIGN(4096);
. = ALIGN(PAGE_SIZE);
.text :
{
@ -39,7 +40,7 @@ SECTIONS
*(.gnu.linkonce.t*)
}
. = ALIGN(4096);
. = ALIGN(PAGE_SIZE);
.syscall_stub : {
__syscall_stub_start = .;
*(.__syscall_stub*)
@ -79,7 +80,7 @@ SECTIONS
.sdata : { *(.sdata) }
_edata = .;
PROVIDE (edata = .);
. = ALIGN(0x1000);
. = ALIGN(PAGE_SIZE);
.sbss :
{
__bss_start = .;

17
include/asm-um/page.h
View File

@ -7,16 +7,20 @@
#ifndef __UM_PAGE_H
#define __UM_PAGE_H
#include <linux/const.h>
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifndef __ASSEMBLY__
struct page;
#include <linux/types.h>
#include <asm/vm-flags.h>
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
/*
* These are used to make use of C type-checking..
*/
@ -120,4 +124,5 @@ extern struct page *arch_validate(struct page *page, gfp_t mask, int order);
#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>
#endif
#endif /* __ASSEMBLY__ */
#endif /* __UM_PAGE_H */