/* ld script to make ARM Linux kernel * taken from the i386 version by Russell King * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> */ #ifdef CONFIG_XIP_KERNEL#include "vmlinux-xip.lds.S"#else #include <asm-generic/vmlinux.lds.h>#include <asm/cache.h>#include <asm/thread_info.h>#include <asm/memory.h>#include <asm/page.h>#include <asm/pgtable.h> #define PROC_INFO \ . = ALIGN(4); \ VMLINUX_SYMBOL(__proc_info_begin) = .; \ *(.proc.info.init) \ VMLINUX_SYMBOL(__proc_info_end) = .; #define HYPERVISOR_TEXT \ VMLINUX_SYMBOL(__hyp_text_start) = .; \ *(.hyp.text) \ VMLINUX_SYMBOL(__hyp_text_end) = .; #define IDMAP_TEXT \ ALIGN_FUNCTION(); \ VMLINUX_SYMBOL(__idmap_text_start) = .; \ *(.idmap.text) \ VMLINUX_SYMBOL(__idmap_text_end) = .; \ . = ALIGN(PAGE_SIZE); \ VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ *(.hyp.idmap.text) \ VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; #ifdef CONFIG_HOTPLUG_CPU#define ARM_CPU_DISCARD(x)#define ARM_CPU_KEEP(x) x#else#define ARM_CPU_DISCARD(x) x#define ARM_CPU_KEEP(x)#endif #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \ defined(CONFIG_GENERIC_BUG) || defined(CONFIG_JUMP_LABEL)#define ARM_EXIT_KEEP(x) x#define ARM_EXIT_DISCARD(x)#else#define ARM_EXIT_KEEP(x)#define ARM_EXIT_DISCARD(x) x#endif OUTPUT_ARCH(arm)ENTRY(stext) #ifndef __ARMEB__jiffies = jiffies_64;#elsejiffies = jiffies_64 + 4;#endif SECTIONS{ /* * XXX: The linker does not define how output sections are * assigned to input sections when there are multiple statements * matching the same input section name. There is no documented * order of matching. * * unwind exit sections must be discarded before the rest of the * unwind sections get included. */ /DISCARD/ : { *(.ARM.exidx.exit.text) *(.ARM.extab.exit.text) ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text)) ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text)) ARM_EXIT_DISCARD(EXIT_TEXT) ARM_EXIT_DISCARD(EXIT_DATA) EXIT_CALL#ifndef CONFIG_MMU *(.text.fixup) *(__ex_table)#endif#ifndef CONFIG_SMP_ON_UP *(.alt.smp.init)#endif *(.discard) *(.discard.*) } . = PAGE_OFFSET + TEXT_OFFSET; .head.text : { _text = .; HEAD_TEXT } #ifdef CONFIG_STRICT_KERNEL_RWX . = ALIGN(1<<SECTION_SHIFT);#endif .text : { /* Real text segment */ _stext = .; /* Text and read-only data */ IDMAP_TEXT __exception_text_start = .; *(.exception.text) __exception_text_end = .; IRQENTRY_TEXT SOFTIRQENTRY_TEXT TEXT_TEXT SCHED_TEXT CPUIDLE_TEXT LOCK_TEXT HYPERVISOR_TEXT KPROBES_TEXT *(.gnu.warning) *(.glue_7) *(.glue_7t) . = ALIGN(4); *(.got) /* Global offset table */ ARM_CPU_KEEP(PROC_INFO) } #ifdef CONFIG_DEBUG_ALIGN_RODATA . = ALIGN(1<<SECTION_SHIFT);#endif _etext = .; /* End of text section */ RO_DATA(PAGE_SIZE) . = ALIGN(4); __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { __start___ex_table = .;#ifdef CONFIG_MMU *(__ex_table)#endif __stop___ex_table = .; } #ifdef CONFIG_ARM_UNWIND /* * Stack unwinding tables */ . = ALIGN(8); .ARM.unwind_idx : { __start_unwind_idx = .; *(.ARM.exidx*) __stop_unwind_idx = .; } .ARM.unwind_tab : { __start_unwind_tab = .; *(.ARM.extab*) __stop_unwind_tab = .; }#endif NOTES #ifdef CONFIG_STRICT_KERNEL_RWX . = ALIGN(1<<SECTION_SHIFT);#else . = ALIGN(PAGE_SIZE);#endif __init_begin = .; /* * The vectors and stubs are relocatable code, and the * only thing that matters is their relative offsets */ __vectors_start = .; .vectors 0xffff0000 : AT(__vectors_start) { *(.vectors) } . = __vectors_start + SIZEOF(.vectors); __vectors_end = .; __stubs_start = .; .stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) { *(.stubs) } . = __stubs_start + SIZEOF(.stubs); __stubs_end = .; PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors)); INIT_TEXT_SECTION(8) .exit.text : { ARM_EXIT_KEEP(EXIT_TEXT) } .init.proc.info : { ARM_CPU_DISCARD(PROC_INFO) } .init.arch.info : { __arch_info_begin = .; *(.arch.info.init) __arch_info_end = .; } .init.tagtable : { __tagtable_begin = .; *(.taglist.init) __tagtable_end = .; }#ifdef CONFIG_SMP_ON_UP .init.smpalt : { __smpalt_begin = .; *(.alt.smp.init) __smpalt_end = .; }#endif .init.pv_table : { __pv_table_begin = .; *(.pv_table) __pv_table_end = .; } .init.data : { INIT_DATA INIT_SETUP(16) INIT_CALLS CON_INITCALL SECURITY_INITCALL INIT_RAM_FS } .exit.data : { ARM_EXIT_KEEP(EXIT_DATA) } #ifdef CONFIG_SMP PERCPU_SECTION(L1_CACHE_BYTES)#endif #ifdef CONFIG_STRICT_KERNEL_RWX . = ALIGN(1<<SECTION_SHIFT);#else . = ALIGN(THREAD_SIZE);#endif __init_end = .; __data_loc = .; .data : AT(__data_loc) { _data = .; /* address in memory */ _sdata = .; /* * first, the init task union, aligned * to an 8192 byte boundary. */ INIT_TASK_DATA(THREAD_SIZE) NOSAVE_DATA CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES) READ_MOSTLY_DATA(L1_CACHE_BYTES) /* * and the usual data section */ DATA_DATA CONSTRUCTORS _edata = .; } _edata_loc = __data_loc + SIZEOF(.data); BUG_TABLE #ifdef CONFIG_HAVE_TCM /* * We align everything to a page boundary so we can * free it after init has commenced and TCM contents have * been copied to its destination. */ .tcm_start : { . = ALIGN(PAGE_SIZE); __tcm_start = .; __itcm_start = .; } /* * Link these to the ITCM RAM * Put VMA to the TCM address and LMA to the common RAM * and we'll upload the contents from RAM to TCM and free * the used RAM after that. */ .text_itcm ITCM_OFFSET : AT(__itcm_start) { __sitcm_text = .; *(.tcm.text) *(.tcm.rodata) . = ALIGN(4); __eitcm_text = .; } /* * Reset the dot pointer, this is needed to create the * relative __dtcm_start below (to be used as extern in code). */ . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm); .dtcm_start : { __dtcm_start = .; } /* TODO: add remainder of ITCM as well, that can be used for data! */ .data_dtcm DTCM_OFFSET : AT(__dtcm_start) { . = ALIGN(4); __sdtcm_data = .; *(.tcm.data) . = ALIGN(4); __edtcm_data = .; } /* Reset the dot pointer or the linker gets confused */ . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm); /* End marker for freeing TCM copy in linked object */ .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){ . = ALIGN(PAGE_SIZE); __tcm_end = .; }#endif BSS_SECTION(0, 0, 0) _end = .; STABS_DEBUG} #ifdef CONFIG_STRICT_KERNEL_RWX/* * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will * be the first section-aligned location after __start_rodata. Otherwise, * it will be equal to __start_rodata. */__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT);#endif /* * These must never be empty * If you have to comment these two assert statements out, your * binutils is too old (for other reasons as well) */ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") /* * The HYP init code can't be more than a page long, * and should not cross a page boundary. * The above comment applies as well. */ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE, "HYP init code too big or misaligned") #endif /* CONFIG_XIP_KERNEL */
/* ld script to make ARM Linux kernel
* taken from the i386 version by Russell King
* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
*/
#ifdef CONFIG_XIP_KERNEL
#include "vmlinux-xip.lds.S"
#else
#include <asm-generic/vmlinux.lds.h>
#include <asm/cache.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#define PROC_INFO \
. = ALIGN(4); \
VMLINUX_SYMBOL(__proc_info_begin) = .; \
*(.proc.info.init) \
VMLINUX_SYMBOL(__proc_info_end) = .;
#define HYPERVISOR_TEXT \
VMLINUX_SYMBOL(__hyp_text_start) = .; \
*(.hyp.text) \
VMLINUX_SYMBOL(__hyp_text_end) = .;
#define IDMAP_TEXT \
ALIGN_FUNCTION(); \
VMLINUX_SYMBOL(__idmap_text_start) = .; \
*(.idmap.text) \
VMLINUX_SYMBOL(__idmap_text_end) = .; \
. = ALIGN(PAGE_SIZE); \
VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
*(.hyp.idmap.text) \
VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
#ifdef CONFIG_HOTPLUG_CPU
#define ARM_CPU_DISCARD(x)
#define ARM_CPU_KEEP(x) x
#else
#define ARM_CPU_DISCARD(x) x
#define ARM_CPU_KEEP(x)
#endif
#if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
defined(CONFIG_GENERIC_BUG) || defined(CONFIG_JUMP_LABEL)
#define ARM_EXIT_KEEP(x) x
#define ARM_EXIT_DISCARD(x)
#else
#define ARM_EXIT_KEEP(x)
#define ARM_EXIT_DISCARD(x) x
#endif
OUTPUT_ARCH(arm)
ENTRY(stext)
#ifndef __ARMEB__
jiffies = jiffies_64;
#else
jiffies = jiffies_64 + 4;
#endif
SECTIONS
{
/*
* XXX: The linker does not define how output sections are
* assigned to input sections when there are multiple statements
* matching the same input section name. There is no documented
* order of matching.
*
* unwind exit sections must be discarded before the rest of the
* unwind sections get included.
*/
/DISCARD/ : {
*(.ARM.exidx.exit.text)
*(.ARM.extab.exit.text)
ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
ARM_EXIT_DISCARD(EXIT_TEXT)
ARM_EXIT_DISCARD(EXIT_DATA)
EXIT_CALL
#ifndef CONFIG_MMU
*(.text.fixup)
*(__ex_table)
#endif
#ifndef CONFIG_SMP_ON_UP
*(.alt.smp.init)
#endif
*(.discard)
*(.discard.*)
}
. = PAGE_OFFSET + TEXT_OFFSET;
.head.text : {
_text = .;
HEAD_TEXT
}
#ifdef CONFIG_STRICT_KERNEL_RWX
. = ALIGN(1<<SECTION_SHIFT);
#endif
.text : { /* Real text segment */
_stext = .; /* Text and read-only data */
IDMAP_TEXT
__exception_text_start = .;
*(.exception.text)
__exception_text_end = .;
IRQENTRY_TEXT
SOFTIRQENTRY_TEXT
TEXT_TEXT
SCHED_TEXT
CPUIDLE_TEXT
LOCK_TEXT
HYPERVISOR_TEXT
KPROBES_TEXT
*(.gnu.warning)
*(.glue_7)
*(.glue_7t)
. = ALIGN(4);
*(.got) /* Global offset table */
ARM_CPU_KEEP(PROC_INFO)
}
#ifdef CONFIG_DEBUG_ALIGN_RODATA
. = ALIGN(1<<SECTION_SHIFT);
#endif
_etext = .; /* End of text section */
RO_DATA(PAGE_SIZE)
. = ALIGN(4);
__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
__start___ex_table = .;
#ifdef CONFIG_MMU
*(__ex_table)
#endif
__stop___ex_table = .;
}
#ifdef CONFIG_ARM_UNWIND
/*
* Stack unwinding tables
*/
. = ALIGN(8);
.ARM.unwind_idx : {
__start_unwind_idx = .;
*(.ARM.exidx*)
__stop_unwind_idx = .;
}
.ARM.unwind_tab : {
__start_unwind_tab = .;
*(.ARM.extab*)
__stop_unwind_tab = .;
}
#endif
NOTES
#ifdef CONFIG_STRICT_KERNEL_RWX
. = ALIGN(1<<SECTION_SHIFT);
#else
. = ALIGN(PAGE_SIZE);
#endif
__init_begin = .;
/*
* The vectors and stubs are relocatable code, and the
* only thing that matters is their relative offsets
*/
__vectors_start = .;
.vectors 0xffff0000 : AT(__vectors_start) {
*(.vectors)
}
. = __vectors_start + SIZEOF(.vectors);
__vectors_end = .;
__stubs_start = .;
.stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
*(.stubs)
}
. = __stubs_start + SIZEOF(.stubs);
__stubs_end = .;
PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
INIT_TEXT_SECTION(8)
.exit.text : {
ARM_EXIT_KEEP(EXIT_TEXT)
}
.init.proc.info : {
ARM_CPU_DISCARD(PROC_INFO)
}
.init.arch.info : {
__arch_info_begin = .;
*(.arch.info.init)
__arch_info_end = .;
}
.init.tagtable : {
__tagtable_begin = .;
*(.taglist.init)
__tagtable_end = .;
}
#ifdef CONFIG_SMP_ON_UP
.init.smpalt : {
__smpalt_begin = .;
*(.alt.smp.init)
__smpalt_end = .;
}
#endif
.init.pv_table : {
__pv_table_begin = .;
*(.pv_table)
__pv_table_end = .;
}
.init.data : {
INIT_DATA
INIT_SETUP(16)
INIT_CALLS
CON_INITCALL
SECURITY_INITCALL
INIT_RAM_FS
}
.exit.data : {
ARM_EXIT_KEEP(EXIT_DATA)
}
#ifdef CONFIG_SMP
PERCPU_SECTION(L1_CACHE_BYTES)
#endif
#ifdef CONFIG_STRICT_KERNEL_RWX
. = ALIGN(1<<SECTION_SHIFT);
#else
. = ALIGN(THREAD_SIZE);
#endif
__init_end = .;
__data_loc = .;
.data : AT(__data_loc) {
_data = .; /* address in memory */
_sdata = .;
/*
* first, the init task union, aligned
* to an 8192 byte boundary.
*/
INIT_TASK_DATA(THREAD_SIZE)
NOSAVE_DATA
CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
READ_MOSTLY_DATA(L1_CACHE_BYTES)
/*
* and the usual data section
*/
DATA_DATA
CONSTRUCTORS
_edata = .;
}
_edata_loc = __data_loc + SIZEOF(.data);
BUG_TABLE
#ifdef CONFIG_HAVE_TCM
/*
* We align everything to a page boundary so we can
* free it after init has commenced and TCM contents have
* been copied to its destination.
*/
.tcm_start : {
. = ALIGN(PAGE_SIZE);
__tcm_start = .;
__itcm_start = .;
}
/*
* Link these to the ITCM RAM
* Put VMA to the TCM address and LMA to the common RAM
* and we'll upload the contents from RAM to TCM and free
* the used RAM after that.
*/
.text_itcm ITCM_OFFSET : AT(__itcm_start)
{
__sitcm_text = .;
*(.tcm.text)
*(.tcm.rodata)
. = ALIGN(4);
__eitcm_text = .;
}
/*
* Reset the dot pointer, this is needed to create the
* relative __dtcm_start below (to be used as extern in code).
*/
. = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
.dtcm_start : {
__dtcm_start = .;
}
/* TODO: add remainder of ITCM as well, that can be used for data! */
.data_dtcm DTCM_OFFSET : AT(__dtcm_start)
{
. = ALIGN(4);
__sdtcm_data = .;
*(.tcm.data)
. = ALIGN(4);
__edtcm_data = .;
}
/* Reset the dot pointer or the linker gets confused */
. = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
/* End marker for freeing TCM copy in linked object */
.tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
. = ALIGN(PAGE_SIZE);
__tcm_end = .;
}
#endif
BSS_SECTION(0, 0, 0)
_end = .;
STABS_DEBUG
}
#ifdef CONFIG_STRICT_KERNEL_RWX
/*
* Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will
* be the first section-aligned location after __start_rodata. Otherwise,
* it will be equal to __start_rodata.
*/
__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT);
#endif
/*
* These must never be empty
* If you have to comment these two assert statements out, your
* binutils is too old (for other reasons as well)
*/
ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
/*
* The HYP init code can't be more than a page long,
* and should not cross a page boundary.
* The above comment applies as well.
*/
ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
"HYP init code too big or misaligned")
#endif /* CONFIG_XIP_KERNEL */