91768d6c2b
This makes i386 use the generic BUG machinery. There are no functional changes from the old i386 implementation. The main advantage in using the generic BUG machinery for i386 is that the inlined overhead of BUG is just the ud2a instruction; the file+line(+function) information are no longer inlined into the instruction stream. This reduces cache pollution, and makes disassembly work properly. Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Andi Kleen <ak@muc.de> Cc: Hugh Dickens <hugh@veritas.com> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
222 lines
5.6 KiB
ArmAsm
222 lines
5.6 KiB
ArmAsm
/* 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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/* 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(4); /* R__ */
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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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/* read-only */
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.text : AT(ADDR(.text) - LOAD_OFFSET) {
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_text = .; /* Text and read-only data */
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*(.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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. = 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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}
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RODATA
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BUG_TABLE
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. = ALIGN(4);
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.tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {
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__tracedata_start = .;
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*(.tracedata)
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__tracedata_end = .;
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}
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/* writeable */
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. = ALIGN(4096);
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.data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */
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*(.data)
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CONSTRUCTORS
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} :data
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.paravirtprobe : AT(ADDR(.paravirtprobe) - LOAD_OFFSET) {
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__start_paravirtprobe = .;
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*(.paravirtprobe)
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__stop_paravirtprobe = .;
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}
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. = ALIGN(4096);
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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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. = ALIGN(4096);
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__nosave_end = .;
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}
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. = ALIGN(4096);
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.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
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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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. = ALIGN(4096);
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.smp_altinstructions : AT(ADDR(.smp_altinstructions) - LOAD_OFFSET) {
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__smp_alt_begin = .;
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__smp_alt_instructions = .;
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*(.smp_altinstructions)
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__smp_alt_instructions_end = .;
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}
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. = ALIGN(4);
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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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.smp_altinstr_replacement : AT(ADDR(.smp_altinstr_replacement) - LOAD_OFFSET) {
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*(.smp_altinstr_replacement)
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__smp_alt_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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. = ALIGN(4096);
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/* will be freed after init */
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. = ALIGN(4096); /* Init code and data */
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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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*(.init.text)
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_einittext = .;
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}
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.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
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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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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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__start_parainstructions = .;
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*(.parainstructions)
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__stop_parainstructions = .;
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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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.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
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.exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
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. = ALIGN(4096);
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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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. = ALIGN(L1_CACHE_BYTES);
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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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__per_cpu_end = .;
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}
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. = ALIGN(4096);
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/* freed after init ends here */
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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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. = ALIGN(4096);
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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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NOTES
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}
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