1 /* ld script to make x86-64 Linux kernel
2 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
5 #define LOAD_OFFSET __START_KERNEL_map
7 #include <asm-generic/vmlinux.lds.h>
10 #undef i386 /* in case the preprocessor is a 32bit one */
12 OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
13 OUTPUT_ARCH(i386:x86-64)
14 ENTRY(phys_startup_64)
18 text PT_LOAD FLAGS(5); /* R_E */
19 data PT_LOAD FLAGS(7); /* RWE */
20 user PT_LOAD FLAGS(7); /* RWE */
21 data.init PT_LOAD FLAGS(7); /* RWE */
22 note PT_NOTE FLAGS(0); /* ___ */
27 phys_startup_64 = startup_64 - LOAD_OFFSET;
28 _text = .; /* Text and read-only data */
29 .text : AT(ADDR(.text) - LOAD_OFFSET) {
30 /* First the code that has to be first for bootstrapping */
40 _etext = .; /* End of text section */
45 . = ALIGN(16); /* Exception table */
46 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
47 __start___ex_table = .;
49 __stop___ex_table = .;
54 . = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
56 .data : AT(ADDR(.data) - LOAD_OFFSET) {
61 _edata = .; /* End of data section */
64 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
65 .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
66 *(.data.cacheline_aligned)
68 . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
69 .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
73 #define VSYSCALL_ADDR (-10*1024*1024)
74 #define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
75 #define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
77 #define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
78 #define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
80 #define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
81 #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
84 .vsyscall_0 : AT(VSYSCALL_PHYS_ADDR) { *(.vsyscall_0) } :user
85 __vsyscall_0 = VSYSCALL_VIRT_ADDR;
87 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
88 .vsyscall_fn : AT(VLOAD(.vsyscall_fn)) { *(.vsyscall_fn) }
89 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
90 .vsyscall_gtod_data : AT(VLOAD(.vsyscall_gtod_data))
91 { *(.vsyscall_gtod_data) }
92 vsyscall_gtod_data = VVIRT(.vsyscall_gtod_data);
93 .vsyscall_clock : AT(VLOAD(.vsyscall_clock))
94 { *(.vsyscall_clock) }
95 vsyscall_clock = VVIRT(.vsyscall_clock);
98 .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1))
100 .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2))
103 .vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) { *(.vgetcpu_mode) }
104 vgetcpu_mode = VVIRT(.vgetcpu_mode);
106 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
107 .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
108 jiffies = VVIRT(.jiffies);
110 .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3))
113 . = VSYSCALL_VIRT_ADDR + PAGE_SIZE;
116 #undef VSYSCALL_PHYS_ADDR
117 #undef VSYSCALL_VIRT_ADDR
123 . = ALIGN(THREAD_SIZE); /* init_task */
124 .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
128 . = ALIGN(PAGE_SIZE);
129 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
130 *(.data.page_aligned)
133 /* might get freed after init */
134 . = ALIGN(PAGE_SIZE);
137 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
141 . = ALIGN(PAGE_SIZE);
144 . = ALIGN(PAGE_SIZE); /* Init code and data */
146 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
151 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
152 __initdata_begin = .;
159 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
161 __initcall_start = .;
162 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
166 __con_initcall_start = .;
167 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
168 *(.con_initcall.init)
170 __con_initcall_end = .;
171 __x86_cpu_dev_start = .;
172 .x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
176 __x86_cpu_dev_end = .;
179 .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
180 __parainstructions = .;
182 __parainstructions_end = .;
186 __alt_instructions = .;
187 .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
190 __alt_instructions_end = .;
191 .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
192 *(.altinstr_replacement)
194 /* .exit.text is discard at runtime, not link time, to deal with references
195 from .altinstructions and .eh_frame */
196 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
199 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
203 #ifdef CONFIG_BLK_DEV_INITRD
204 . = ALIGN(PAGE_SIZE);
205 __initramfs_start = .;
206 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
212 . = ALIGN(PAGE_SIZE);
215 . = ALIGN(PAGE_SIZE);
217 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
218 . = ALIGN(PAGE_SIZE);
221 __bss_start = .; /* BSS */
222 .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
230 /* Sections to be discarded */
242 * Build-time check on the image size:
244 ASSERT((_end - _text <= KERNEL_IMAGE_SIZE),
245 "kernel image bigger than KERNEL_IMAGE_SIZE")