
x86 throws away .discard section but no other archs do. Also, .discard is not thrown away while linking modules. Make every arch and module linking throw it away. This will be used to define dummy variables for percpu declarations and definitions. This patch is based on Ivan Kokshaysky's alpha percpu patch. [ Impact: always throw away everything in .discard ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Bryan Wu <cooloney@kernel.org> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: David S. Miller <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Chris Zankel <chris@zankel.net> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@elte.hu>
217 lines
4.1 KiB
ArmAsm
217 lines
4.1 KiB
ArmAsm
/* ld script to make ARM Linux kernel
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* taken from the i386 version by Russell King
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* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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*/
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/thread_info.h>
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#include <asm/memory.h>
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OUTPUT_ARCH(arm)
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ENTRY(stext)
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#ifndef __ARMEB__
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jiffies = jiffies_64;
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#else
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jiffies = jiffies_64 + 4;
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#endif
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SECTIONS
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{
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#ifdef CONFIG_XIP_KERNEL
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. = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
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#else
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. = PAGE_OFFSET + TEXT_OFFSET;
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#endif
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.text.head : {
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_stext = .;
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_sinittext = .;
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*(.text.head)
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}
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.init : { /* Init code and data */
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INIT_TEXT
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_einittext = .;
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__proc_info_begin = .;
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*(.proc.info.init)
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__proc_info_end = .;
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__arch_info_begin = .;
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*(.arch.info.init)
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__arch_info_end = .;
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__tagtable_begin = .;
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*(.taglist.init)
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__tagtable_end = .;
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. = ALIGN(16);
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__setup_start = .;
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*(.init.setup)
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__setup_end = .;
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__early_begin = .;
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*(.early_param.init)
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__early_end = .;
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__initcall_start = .;
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INITCALLS
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__initcall_end = .;
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__con_initcall_start = .;
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*(.con_initcall.init)
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__con_initcall_end = .;
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__security_initcall_start = .;
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*(.security_initcall.init)
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__security_initcall_end = .;
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#ifdef CONFIG_BLK_DEV_INITRD
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. = ALIGN(32);
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__initramfs_start = .;
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usr/built-in.o(.init.ramfs)
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__initramfs_end = .;
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#endif
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. = ALIGN(4096);
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__per_cpu_load = .;
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__per_cpu_start = .;
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*(.data.percpu.page_aligned)
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*(.data.percpu)
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*(.data.percpu.shared_aligned)
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__per_cpu_end = .;
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#ifndef CONFIG_XIP_KERNEL
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__init_begin = _stext;
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INIT_DATA
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. = ALIGN(4096);
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__init_end = .;
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#endif
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}
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/DISCARD/ : { /* Exit code and data */
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EXIT_TEXT
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EXIT_DATA
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*(.exitcall.exit)
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*(.discard)
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*(.ARM.exidx.exit.text)
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*(.ARM.extab.exit.text)
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#ifndef CONFIG_MMU
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*(.fixup)
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*(__ex_table)
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#endif
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}
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.text : { /* Real text segment */
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_text = .; /* Text and read-only data */
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__exception_text_start = .;
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*(.exception.text)
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__exception_text_end = .;
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TEXT_TEXT
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SCHED_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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#ifdef CONFIG_MMU
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*(.fixup)
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#endif
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*(.gnu.warning)
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*(.rodata)
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*(.rodata.*)
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*(.glue_7)
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*(.glue_7t)
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*(.got) /* Global offset table */
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}
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RODATA
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_etext = .; /* End of text and rodata section */
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#ifdef CONFIG_ARM_UNWIND
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/*
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* Stack unwinding tables
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*/
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. = ALIGN(8);
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.ARM.unwind_idx : {
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__start_unwind_idx = .;
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*(.ARM.exidx*)
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__stop_unwind_idx = .;
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}
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.ARM.unwind_tab : {
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__start_unwind_tab = .;
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*(.ARM.extab*)
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__stop_unwind_tab = .;
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}
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#endif
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#ifdef CONFIG_XIP_KERNEL
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__data_loc = ALIGN(4); /* location in binary */
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. = PAGE_OFFSET + TEXT_OFFSET;
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#else
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. = ALIGN(THREAD_SIZE);
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__data_loc = .;
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#endif
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.data : AT(__data_loc) {
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_data = .; /* address in memory */
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_sdata = .;
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/*
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* first, the init task union, aligned
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* to an 8192 byte boundary.
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*/
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*(.data.init_task)
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#ifdef CONFIG_XIP_KERNEL
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. = ALIGN(4096);
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__init_begin = .;
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INIT_DATA
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. = ALIGN(4096);
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__init_end = .;
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#endif
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. = ALIGN(4096);
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__nosave_begin = .;
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*(.data.nosave)
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. = ALIGN(4096);
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__nosave_end = .;
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/*
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* then the cacheline aligned data
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*/
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. = ALIGN(32);
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*(.data.cacheline_aligned)
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/*
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* The exception fixup table (might need resorting at runtime)
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*/
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. = ALIGN(32);
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__start___ex_table = .;
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#ifdef CONFIG_MMU
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*(__ex_table)
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#endif
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__stop___ex_table = .;
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/*
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* and the usual data section
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*/
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DATA_DATA
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CONSTRUCTORS
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_edata = .;
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}
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_edata_loc = __data_loc + SIZEOF(.data);
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.bss : {
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__bss_start = .; /* BSS */
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*(.bss)
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*(COMMON)
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__bss_stop = .;
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_end = .;
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}
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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}
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/*
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* These must never be empty
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* If you have to comment these two assert statements out, your
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* binutils is too old (for other reasons as well)
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*/
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ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
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ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
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