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m68knommu: clean up linker script

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There is a lot of years of collected cruft in the m68knommu linker script.
Clean it all up and use the well defined linker script support macros.

Support is maintained for building both ROM/FLASH based and RAM based setups.
No major changes to section layouts, though the rodata section is now lumped
in with the read/write data section.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
This commit is contained in:
Greg Ungerer 2012-01-05 15:51:13 +10:00
parent 10cb54de2c
commit f84f52a5c1
1 changed files with 48 additions and 150 deletions
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198
arch/m68k/kernel/vmlinux-nommu.lds
View File

@ -1,195 +1,93 @@
/*
* vmlinux.lds.S -- master linker script for m68knommu arch
*
* (C) Copyright 2002-2006, Greg Ungerer <gerg@snapgear.com>
* (C) Copyright 2002-2012, Greg Ungerer <gerg@snapgear.com>
*
* This linker script is equipped to build either ROM loaded or RAM
* run kernels.
*/
#include <asm-generic/vmlinux.lds.h>
#if defined(CONFIG_RAMKERNEL)
#define KTEXT_ADDR CONFIG_KERNELBASE
#endif
#if defined(CONFIG_ROMKERNEL)
#define KTEXT_ADDR CONFIG_ROMSTART
#define KDATA_ADDR CONFIG_KERNELBASE
#define LOAD_OFFSET KDATA_ADDR + (ADDR(.text) + SIZEOF(.text))
#endif
#include <asm/page.h>
#include <asm/thread_info.h>
#if defined(CONFIG_RAMKERNEL)
#define RAM_START CONFIG_KERNELBASE
#define RAM_LENGTH (CONFIG_RAMBASE + CONFIG_RAMSIZE - CONFIG_KERNELBASE)
#define TEXT ram
#define DATA ram
#define INIT ram
#define BSSS ram
#endif
#if defined(CONFIG_ROMKERNEL) || defined(CONFIG_HIMEMKERNEL)
#define RAM_START CONFIG_RAMBASE
#define RAM_LENGTH CONFIG_RAMSIZE
#define ROMVEC_START CONFIG_ROMVEC
#define ROMVEC_LENGTH CONFIG_ROMVECSIZE
#define ROM_START CONFIG_ROMSTART
#define ROM_LENGTH CONFIG_ROMSIZE
#define TEXT rom
#define DATA ram
#define INIT ram
#define BSSS ram
#endif
#ifndef DATA_ADDR
#define DATA_ADDR
#endif
#include <asm-generic/vmlinux.lds.h>
OUTPUT_ARCH(m68k)
ENTRY(_start)
MEMORY {
ram : ORIGIN = RAM_START, LENGTH = RAM_LENGTH
#ifdef ROM_START
romvec : ORIGIN = ROMVEC_START, LENGTH = ROMVEC_LENGTH
rom : ORIGIN = ROM_START, LENGTH = ROM_LENGTH
#endif
}
jiffies = jiffies_64 + 4;
SECTIONS {
#ifdef ROMVEC_START
. = ROMVEC_START ;
#ifdef CONFIG_ROMVEC
. = CONFIG_ROMVEC;
.romvec : {
__rom_start = . ;
__rom_start = .;
_romvec = .;
*(.romvec)
*(.data..initvect)
} > romvec
}
#endif
. = KTEXT_ADDR;
_text = .;
_stext = .;
.text : {
_text = .;
_stext = . ;
HEAD_TEXT
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT
*(.text..lock)
*(.fixup)
. = ALIGN(16);
}
_etext = .;
. = ALIGN(16); /* Exception table */
__start___ex_table = .;
*(__ex_table)
__stop___ex_table = .;
#ifdef KDATA_ADDR
. = KDATA_ADDR;
#endif
*(.rodata) *(.rodata.*)
*(__vermagic) /* Kernel version magic */
*(.rodata1)
*(.rodata.str1.1)
_sdata = .;
RO_DATA_SECTION(PAGE_SIZE)
RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE)
_edata = .;
/* Kernel symbol table: Normal symbols */
. = ALIGN(4);
__start___ksymtab = .;
*(SORT(___ksymtab+*))
__stop___ksymtab = .;
/* Kernel symbol table: GPL-only symbols */
__start___ksymtab_gpl = .;
*(SORT(___ksymtab_gpl+*))
__stop___ksymtab_gpl = .;
/* Kernel symbol table: Normal unused symbols */
__start___ksymtab_unused = .;
*(SORT(___ksymtab_unused+*))
__stop___ksymtab_unused = .;
/* Kernel symbol table: GPL-only unused symbols */
__start___ksymtab_unused_gpl = .;
*(SORT(___ksymtab_unused_gpl+*))
__stop___ksymtab_unused_gpl = .;
/* Kernel symbol table: GPL-future symbols */
__start___ksymtab_gpl_future = .;
*(SORT(___ksymtab_gpl_future+*))
__stop___ksymtab_gpl_future = .;
/* Kernel symbol table: Normal symbols */
__start___kcrctab = .;
*(SORT(___kcrctab+*))
__stop___kcrctab = .;
/* Kernel symbol table: GPL-only symbols */
__start___kcrctab_gpl = .;
*(SORT(___kcrctab_gpl+*))
__stop___kcrctab_gpl = .;
/* Kernel symbol table: Normal unused symbols */
__start___kcrctab_unused = .;
*(SORT(___kcrctab_unused+*))
__stop___kcrctab_unused = .;
/* Kernel symbol table: GPL-only unused symbols */
__start___kcrctab_unused_gpl = .;
*(SORT(___kcrctab_unused_gpl+*))
__stop___kcrctab_unused_gpl = .;
/* Kernel symbol table: GPL-future symbols */
__start___kcrctab_gpl_future = .;
*(SORT(___kcrctab_gpl_future+*))
__stop___kcrctab_gpl_future = .;
/* Kernel symbol table: strings */
*(__ksymtab_strings)
/* Built-in module parameters */
. = ALIGN(4) ;
__start___param = .;
*(__param)
__stop___param = .;
/* Built-in module versions */
. = ALIGN(4) ;
__start___modver = .;
*(__modver)
__stop___modver = .;
. = ALIGN(4) ;
_etext = . ;
} > TEXT
.data DATA_ADDR : {
. = ALIGN(4);
_sdata = . ;
DATA_DATA
CACHELINE_ALIGNED_DATA(32)
PAGE_ALIGNED_DATA(PAGE_SIZE)
*(.data..shared_aligned)
INIT_TASK_DATA(THREAD_SIZE)
_edata = . ;
} > DATA
EXCEPTION_TABLE(16)
NOTES
. = ALIGN(PAGE_SIZE);
__init_begin = .;
INIT_TEXT_SECTION(PAGE_SIZE)
INIT_DATA_SECTION(16)
PERCPU_SECTION(16)
.m68k_fixup : {
__start_fixup = .;
*(.m68k_fixup)
__stop_fixup = .;
} > DATA
NOTES > DATA
.init.text : {
. = ALIGN(PAGE_SIZE);
__init_begin = .;
} > INIT
INIT_TEXT_SECTION(PAGE_SIZE) > INIT
INIT_DATA_SECTION(16) > INIT
}
.init.data : {
. = ALIGN(PAGE_SIZE);
__init_end = .;
} > INIT
}
.bss : {
. = ALIGN(4);
_sbss = . ;
*(.bss)
*(COMMON)
. = ALIGN(4) ;
_ebss = . ;
_end = . ;
} > BSSS
_sbss = .;
BSS_SECTION(0, 0, 0)
_ebss = .;
_end = .;
STABS_DEBUG
.comment 0 : { *(.comment) }
/* Sections to be discarded */
DISCARDS
}