m68knommu: clean up linker script

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>

diff --git a/arch/m68k/kernel/vmlinux-nommu.lds b/arch/m68k/kernel/vmlinux-nommu.lds
index 8e66ccb0935ee5c408e17c4614b66397cc1dbbdf..40e02d9c38b4df4bac25bf659d44885dd99f9fa8 100644 (file)
--- a/arch/m68k/kernel/vmlinux-nommu.lds
+++ b/arch/m68k/kernel/vmlinux-nommu.lds
@@ -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>
-#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
+#define        KTEXT_ADDR      CONFIG_KERNELBASE
 #endif
-
-#ifndef DATA_ADDR
-#define        DATA_ADDR
+#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>
+#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 = .;
+
+#ifdef KDATA_ADDR
+       . = KDATA_ADDR;
+#endif
+
+       _sdata = .;
+       RO_DATA_SECTION(PAGE_SIZE)
+       RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE)
+       _edata = .;
 
-               . = ALIGN(16);          /* Exception table              */
-               __start___ex_table = .;
-               *(__ex_table)
-               __stop___ex_table = .;
-
-               *(.rodata) *(.rodata.*)
-               *(__vermagic)           /* Kernel version magic */
-               *(.rodata1)
-               *(.rodata.str1.1)
-
-               /* 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
 }