2007-10-11 09:12:11 +00:00
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/* ld script to make i386 Linux kernel
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* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
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*
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* Don't define absolute symbols until and unless you know that symbol
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* value is should remain constant even if kernel image is relocated
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* at run time. Absolute symbols are not relocated. If symbol value should
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* change if kernel is relocated, make the symbol section relative and
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* put it inside the section definition.
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*/
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#define LOAD_OFFSET __PAGE_OFFSET
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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/page.h>
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#include <asm/cache.h>
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#include <asm/boot.h>
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OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
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OUTPUT_ARCH(i386)
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ENTRY(phys_startup_32)
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jiffies = jiffies_64;
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PHDRS {
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text PT_LOAD FLAGS(5); /* R_E */
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data PT_LOAD FLAGS(7); /* RWE */
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note PT_NOTE FLAGS(0); /* ___ */
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}
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SECTIONS
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{
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. = LOAD_OFFSET + LOAD_PHYSICAL_ADDR;
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phys_startup_32 = startup_32 - LOAD_OFFSET;
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.text.head : AT(ADDR(.text.head) - LOAD_OFFSET) {
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_text = .; /* Text and read-only data */
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*(.text.head)
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} :text = 0x9090
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/* read-only */
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.text : AT(ADDR(.text) - LOAD_OFFSET) {
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE); /* not really needed, already page aligned */
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x86: make arch/x86/kernel/acpi/wakeup_32.S use a separate
While examining vmlinux namelist on i386 (nm -v vmlinux) I noticed :
c01021d0 t es7000_rename_gsi
c010221a T es7000_start_cpu
<Big Hole>
c0103000 T thread_saved_pc
and
c0113218 T acpi_restore_state_mem
c0113219 T acpi_save_state_mem
<Big Hole>
c0114000 t wakeup_code
This is because arch/x86/kernel/acpi/wakeup_32.S forces a .text alignment
of 4096 bytes. (I have no idea if it is really needed, since
arch/x86/kernel/acpi/wakeup_64.S uses a 16 bytes alignment *only*)
So arch/x86/kernel/built-in.o also has this alignment
arch/x86/kernel/built-in.o: file format elf32-i386
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 00018c94 00000000 00000000 00001000 2**12
CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
But as arch/x86/kernel/acpi/wakeup_32.o is not the first object linked
into arch/x86/kernel/built-in.o, linker had to build several holes to meet
alignement requirements, because of .o nestings in the kbuild process.
This can be solved by using a special section, .text.page_aligned, so that
no holes are needed.
# size vmlinux.before vmlinux.after
text data bss dec hex filename
4619942 422838 458752 5501532 53f25c vmlinux.before
4610534 422838 458752 5492124 53cd9c vmlinux.after
This saves 9408 bytes
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 12:32:50 +00:00
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*(.text.page_aligned)
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2007-10-11 09:12:11 +00:00
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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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*(.fixup)
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*(.gnu.warning)
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_etext = .; /* End of text section */
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} :text = 0x9090
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2008-05-12 13:44:41 +00:00
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NOTES :text :note
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2007-10-11 09:12:11 +00:00
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. = ALIGN(16); /* Exception table */
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__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
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__start___ex_table = .;
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*(__ex_table)
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__stop___ex_table = .;
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2008-05-12 13:44:41 +00:00
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} :text = 0x9090
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2007-10-11 09:12:11 +00:00
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RODATA
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/* writeable */
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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.data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */
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DATA_DATA
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CONSTRUCTORS
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} :data
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
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__nosave_begin = .;
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*(.data.nosave)
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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__nosave_end = .;
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}
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
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*(.data.page_aligned)
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*(.data.idt)
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}
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. = ALIGN(32);
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.data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
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*(.data.cacheline_aligned)
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}
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/* rarely changed data like cpu maps */
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. = ALIGN(32);
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.data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
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*(.data.read_mostly)
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_edata = .; /* End of data section */
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}
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. = ALIGN(THREAD_SIZE); /* init_task */
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.data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
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*(.data.init_task)
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}
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/* might get freed after init */
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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.smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
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__smp_locks = .;
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*(.smp_locks)
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__smp_locks_end = .;
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}
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/* will be freed after init
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* Following ALIGN() is required to make sure no other data falls on the
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* same page where __smp_alt_end is pointing as that page might be freed
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* after boot. Always make sure that ALIGN() directive is present after
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* the section which contains __smp_alt_end.
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*/
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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/* will be freed after init */
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE); /* Init code and data */
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2007-10-11 09:12:11 +00:00
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.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
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__init_begin = .;
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_sinittext = .;
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2008-01-20 13:15:03 +00:00
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INIT_TEXT
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2007-10-11 09:12:11 +00:00
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_einittext = .;
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}
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2008-01-20 13:15:03 +00:00
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.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
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INIT_DATA
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}
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2007-10-11 09:12:11 +00:00
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. = ALIGN(16);
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.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
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__setup_start = .;
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*(.init.setup)
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__setup_end = .;
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}
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.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
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__initcall_start = .;
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INITCALLS
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__initcall_end = .;
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}
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.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
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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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}
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2008-09-04 19:09:45 +00:00
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.x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
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__x86_cpu_dev_start = .;
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*(.x86_cpu_dev.init)
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__x86_cpu_dev_end = .;
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x86: use ELF section to list CPU vendor specific code
Replace the hardcoded list of initialization functions for each CPU
vendor by a list in an ELF section, which is read at initialization in
arch/x86/kernel/cpu/cpu.c to fill the cpu_devs[] array. The ELF
section, named .x86cpuvendor.init, is reclaimed after boot, and
contains entries of type "struct cpu_vendor_dev" which associates a
vendor number with a pointer to a "struct cpu_dev" structure.
This first modification allows to remove all the VENDOR_init_cpu()
functions.
This patch also removes the hardcoded calls to early_init_amd() and
early_init_intel(). Instead, we add a "c_early_init" member to the
cpu_dev structure, which is then called if not NULL by the generic CPU
initialization code. Unfortunately, in early_cpu_detect(), this_cpu is
not yet set, so we have to use the cpu_devs[] array directly.
This patch is part of the Linux Tiny project, and is needed for
further patch that will allow to disable compilation of unused CPU
support code.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-15 11:00:23 +00:00
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}
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2007-10-11 09:12:11 +00:00
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SECURITY_INIT
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. = ALIGN(4);
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.altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
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__alt_instructions = .;
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*(.altinstructions)
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__alt_instructions_end = .;
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}
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.altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
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*(.altinstr_replacement)
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}
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. = ALIGN(4);
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.parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
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__parainstructions = .;
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*(.parainstructions)
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__parainstructions_end = .;
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}
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/* .exit.text is discard at runtime, not link time, to deal with references
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from .altinstructions and .eh_frame */
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2008-01-20 13:15:03 +00:00
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.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
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EXIT_TEXT
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}
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.exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
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EXIT_DATA
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}
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2007-10-11 09:12:11 +00:00
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#if defined(CONFIG_BLK_DEV_INITRD)
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
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__initramfs_start = .;
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*(.init.ramfs)
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__initramfs_end = .;
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}
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#endif
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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.data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) {
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__per_cpu_start = .;
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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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}
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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/* freed after init ends here */
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2008-02-17 15:17:17 +00:00
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2007-10-11 09:12:11 +00:00
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.bss : AT(ADDR(.bss) - LOAD_OFFSET) {
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__init_end = .;
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__bss_start = .; /* BSS */
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*(.bss.page_aligned)
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*(.bss)
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. = ALIGN(4);
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__bss_stop = .;
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_end = . ;
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/* This is where the kernel creates the early boot page tables */
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2008-02-17 15:17:17 +00:00
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. = ALIGN(PAGE_SIZE);
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2007-10-11 09:12:11 +00:00
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pg0 = . ;
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}
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/* Sections to be discarded */
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/DISCARD/ : {
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*(.exitcall.exit)
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}
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STABS_DEBUG
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DWARF_DEBUG
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}
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2008-08-15 07:40:23 +00:00
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#ifdef CONFIG_KEXEC
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/* Link time checks */
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#include <asm/kexec.h>
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ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE,
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"kexec control code size is too big")
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#endif
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