vmlinux.lds.s

来自「linux 内核源代码」· S 代码 · 共 257 行

/*    Kernel link layout for various "sections"
 *
 *    Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
 *    Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
 *    Copyright (C) 2000 John Marvin <jsm at parisc-linux.org>
 *    Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
 *    Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
 *    Copyright (C) 2003 James Bottomley <jejb with parisc-linux.org>
 *    Copyright (C) 2006 Helge Deller <[e-mail]>
 *
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <asm-generic/vmlinux.lds.h>
/* needed for the processor specific cache alignment size */	
#include <asm/cache.h>
#include <asm/page.h>
#include <asm/asm-offsets.h>
	
/* ld script to make hppa Linux kernel */
#ifndef CONFIG_64BIT
OUTPUT_FORMAT("elf32-hppa-linux")
OUTPUT_ARCH(hppa)
#else
OUTPUT_FORMAT("elf64-hppa-linux")
OUTPUT_ARCH(hppa:hppa2.0w)
#endif

ENTRY(_stext)
#ifndef CONFIG_64BIT
jiffies = jiffies_64 + 4;
#else
jiffies = jiffies_64;
#endif
SECTIONS
{
	. = KERNEL_BINARY_TEXT_START;

	_text = .;		/* Text and read-only data */
	.text ALIGN(16) : {
		TEXT_TEXT
		SCHED_TEXT
		LOCK_TEXT
		*(.text.do_softirq)
		*(.text.sys_exit)
		*(.text.do_sigaltstack)
		*(.text.do_fork)
		*(.text.*)
		*(.fixup)
		*(.lock.text)		/* out-of-line lock text */
		*(.gnu.warning)
	} = 0
	/* End of text section */
	_etext = .;

	RODATA
	BUG_TABLE

	/* writeable */
	/* Make sure this is page aligned so
	 * that we can properly leave these
	 * as writable
	 */
	. = ALIGN(PAGE_SIZE);
	data_start = .;
	. = ALIGN(16);
	/* Exception table */
	__ex_table : {
		__start___ex_table = .;
		*(__ex_table)
		__stop___ex_table = .;
	}

	NOTES

	/* unwind info */
	.PARISC.unwind : {
		__start___unwind = .;
		*(.PARISC.unwind)
		__stop___unwind = .;
	}

	/* rarely changed data like cpu maps */
	. = ALIGN(16);
	.data.read_mostly : {
		*(.data.read_mostly)
	}

	. = ALIGN(L1_CACHE_BYTES);
	/* Data */
	.data : {
		DATA_DATA
		CONSTRUCTORS
	}

	. = ALIGN(L1_CACHE_BYTES);
	.data.cacheline_aligned : {
		*(.data.cacheline_aligned)
	}

	/* PA-RISC locks requires 16-byte alignment */
	. = ALIGN(16);
	.data.lock_aligned : {
		*(.data.lock_aligned)
	}

	/* nosave data is really only used for software suspend...it's here
	 * just in case we ever implement it
	 */
	. = ALIGN(PAGE_SIZE);
	__nosave_begin = .;
	.data_nosave : {
		*(.data.nosave)
	}
	. = ALIGN(PAGE_SIZE);
	__nosave_end = .;

	/* End of data section */
	_edata = .;

	/* BSS */
	__bss_start = .;
	/* page table entries need to be PAGE_SIZE aligned */
	. = ALIGN(PAGE_SIZE);
	.data.vmpages : {
		*(.data.vm0.pmd)
		*(.data.vm0.pgd)
		*(.data.vm0.pte)
	}
	.bss : {
		*(.bss)
		*(COMMON)
	}
	__bss_stop = .;


	/* assembler code expects init_task to be 16k aligned */
	. = ALIGN(16384);
	/* init_task */
	.data.init_task : {
		*(.data.init_task)
	}

#ifdef CONFIG_64BIT
	. = ALIGN(16);
	/* Linkage tables */
	.opd : {
		*(.opd)
	} PROVIDE (__gp = .); 
	.plt : {
		*(.plt)
	} 
	.dlt : {
		*(.dlt)
	}
#endif

	/* reserve space for interrupt stack by aligning __init* to 16k */
	. = ALIGN(16384);
	__init_begin = .;
	.init.text : { 
		_sinittext = .;
		*(.init.text)
		_einittext = .;
	}
	.init.data : {
		*(.init.data)
	}
	. = ALIGN(16);
	.init.setup : {
		__setup_start = .;
		*(.init.setup)
		__setup_end = .;
	}
	.initcall.init : {
		__initcall_start = .;
		INITCALLS
		__initcall_end = .;
	}
	.con_initcall.init : {
		__con_initcall_start = .;
		*(.con_initcall.init)
		__con_initcall_end = .;
	}
	SECURITY_INIT

	/* alternate instruction replacement.  This is a mechanism x86 uses
	 * to detect the CPU type and replace generic instruction sequences
	 * with CPU specific ones.  We don't currently do this in PA, but
	 * it seems like a good idea...
	 */
	. = ALIGN(4);
	.altinstructions : {
		__alt_instructions = .;
		*(.altinstructions)
		__alt_instructions_end = .; 
	} 
	.altinstr_replacement : {
		*(.altinstr_replacement)
	} 

	/* .exit.text is discard at runtime, not link time, to deal with references
	 *  from .altinstructions and .eh_frame
	 */
	.exit.text : {
		*(.exit.text)
	}
	.exit.data : {
		*(.exit.data)
	}
#ifdef CONFIG_BLK_DEV_INITRD
	. = ALIGN(PAGE_SIZE);
	.init.ramfs : {
		__initramfs_start = .;
		*(.init.ramfs)
		__initramfs_end = .;
	}
#endif

	PERCPU(PAGE_SIZE)
	. = ALIGN(PAGE_SIZE);
	__init_end = .;
	/* freed after init ends here */
	_end = . ;

	/* Sections to be discarded */
	/DISCARD/ : {
		*(.exitcall.exit)
#ifdef CONFIG_64BIT
		/* temporary hack until binutils is fixed to not emit these
	 	 * for static binaries
		 */
		*(.interp)
		*(.dynsym)
		*(.dynstr)
		*(.dynamic)
		*(.hash)
		*(.gnu.hash)
#endif
	}

	STABS_DEBUG
	.note 0 : { *(.note) }	
}