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 = .;
55 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {
56 __tracedata_start = .;
61 . = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
63 .data : AT(ADDR(.data) - LOAD_OFFSET) {
68 _edata = .; /* End of data section */
71 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
72 .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
73 *(.data.cacheline_aligned)
75 . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
76 .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
80 #define VSYSCALL_ADDR (-10*1024*1024)
81 #define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
82 #define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
84 #define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
85 #define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
87 #define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
88 #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
91 .vsyscall_0 : AT(VSYSCALL_PHYS_ADDR) { *(.vsyscall_0) } :user
92 __vsyscall_0 = VSYSCALL_VIRT_ADDR;
94 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
95 .vsyscall_fn : AT(VLOAD(.vsyscall_fn)) { *(.vsyscall_fn) }
96 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
97 .vsyscall_gtod_data : AT(VLOAD(.vsyscall_gtod_data))
98 { *(.vsyscall_gtod_data) }
99 vsyscall_gtod_data = VVIRT(.vsyscall_gtod_data);
100 .vsyscall_clock : AT(VLOAD(.vsyscall_clock))
101 { *(.vsyscall_clock) }
102 vsyscall_clock = VVIRT(.vsyscall_clock);
105 .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1))
107 .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2))
110 .vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) { *(.vgetcpu_mode) }
111 vgetcpu_mode = VVIRT(.vgetcpu_mode);
113 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
114 .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
115 jiffies = VVIRT(.jiffies);
117 .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3))
120 . = VSYSCALL_VIRT_ADDR + PAGE_SIZE;
123 #undef VSYSCALL_PHYS_ADDR
124 #undef VSYSCALL_VIRT_ADDR
130 . = ALIGN(THREAD_SIZE); /* init_task */
131 .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
135 . = ALIGN(PAGE_SIZE);
136 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
137 *(.data.page_aligned)
140 /* might get freed after init */
141 . = ALIGN(PAGE_SIZE);
144 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
148 . = ALIGN(PAGE_SIZE);
151 . = ALIGN(PAGE_SIZE); /* Init code and data */
153 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
158 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
159 __initdata_begin = .;
166 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
168 __initcall_start = .;
169 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
173 __con_initcall_start = .;
174 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
175 *(.con_initcall.init)
177 __con_initcall_end = .;
178 __x86cpuvendor_start = .;
179 .x86cpuvendor.init : AT(ADDR(.x86cpuvendor.init) - LOAD_OFFSET) {
180 *(.x86cpuvendor.init)
182 __x86cpuvendor_end = .;
186 .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
187 __parainstructions = .;
189 __parainstructions_end = .;
193 __alt_instructions = .;
194 .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
197 __alt_instructions_end = .;
198 .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
199 *(.altinstr_replacement)
201 /* .exit.text is discard at runtime, not link time, to deal with references
202 from .altinstructions and .eh_frame */
203 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
206 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
210 #ifdef CONFIG_BLK_DEV_INITRD
211 . = ALIGN(PAGE_SIZE);
212 __initramfs_start = .;
213 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
219 . = ALIGN(PAGE_SIZE);
222 . = ALIGN(PAGE_SIZE);
224 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
225 . = ALIGN(PAGE_SIZE);
228 __bss_start = .; /* BSS */
229 .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
237 /* Sections to be discarded */
249 * Build-time check on the image size:
251 ASSERT((_end - _text <= KERNEL_IMAGE_SIZE),
252 "kernel image bigger than KERNEL_IMAGE_SIZE")