1 /* ld script to make i386 Linux kernel
2 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
4 * Don't define absolute symbols until and unless you know that symbol
5 * value is should remain constant even if kernel image is relocated
6 * at run time. Absolute symbols are not relocated. If symbol value should
7 * change if kernel is relocated, make the symbol section relative and
8 * put it inside the section definition.
11 #define LOAD_OFFSET __PAGE_OFFSET
13 #include <asm-generic/vmlinux.lds.h>
14 #include <asm/thread_info.h>
16 #include <asm/cache.h>
19 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
21 ENTRY(phys_startup_32)
25 text PT_LOAD FLAGS(5); /* R_E */
26 data PT_LOAD FLAGS(7); /* RWE */
27 note PT_NOTE FLAGS(0); /* ___ */
31 . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR;
32 phys_startup_32 = startup_32 - LOAD_OFFSET;
34 .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) {
35 _text = .; /* Text and read-only data */
40 .text : AT(ADDR(.text) - LOAD_OFFSET) {
41 . = ALIGN(PAGE_SIZE); /* not really needed, already page aligned */
49 _etext = .; /* End of text section */
52 . = ALIGN(16); /* Exception table */
53 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
54 __start___ex_table = .;
56 __stop___ex_table = .;
64 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {
65 __tracedata_start = .;
74 .data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */
80 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
88 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
94 .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
95 *(.data.cacheline_aligned)
98 /* rarely changed data like cpu maps */
100 .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
102 _edata = .; /* End of data section */
105 . = ALIGN(THREAD_SIZE); /* init_task */
106 .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
110 /* might get freed after init */
111 . = ALIGN(PAGE_SIZE);
112 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
117 /* will be freed after init
118 * Following ALIGN() is required to make sure no other data falls on the
119 * same page where __smp_alt_end is pointing as that page might be freed
120 * after boot. Always make sure that ALIGN() directive is present after
121 * the section which contains __smp_alt_end.
123 . = ALIGN(PAGE_SIZE);
125 /* will be freed after init */
126 . = ALIGN(PAGE_SIZE); /* Init code and data */
127 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
133 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
137 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
142 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
143 __initcall_start = .;
147 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
148 __con_initcall_start = .;
149 *(.con_initcall.init)
150 __con_initcall_end = .;
154 .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
155 __alt_instructions = .;
157 __alt_instructions_end = .;
159 .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
160 *(.altinstr_replacement)
163 .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
164 __parainstructions = .;
166 __parainstructions_end = .;
168 /* .exit.text is discard at runtime, not link time, to deal with references
169 from .altinstructions and .eh_frame */
170 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
173 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
176 #if defined(CONFIG_BLK_DEV_INITRD)
177 . = ALIGN(PAGE_SIZE);
178 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
179 __initramfs_start = .;
184 . = ALIGN(PAGE_SIZE);
185 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) {
188 *(.data.percpu.shared_aligned)
191 . = ALIGN(PAGE_SIZE);
192 /* freed after init ends here */
194 .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
196 __bss_start = .; /* BSS */
202 /* This is where the kernel creates the early boot page tables */
203 . = ALIGN(PAGE_SIZE);
207 /* Sections to be discarded */