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(4); /* R__ */
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 */
33 /* Then all the functions that are "hot" in profiles, to group them
34 onto the same hugetlb entry */
35 #include "functionlist"
44 /* out-of-line lock text */
45 .text.lock : AT(ADDR(.text.lock) - LOAD_OFFSET) { *(.text.lock) }
47 _etext = .; /* End of text section */
49 . = ALIGN(16); /* Exception table */
50 __start___ex_table = .;
51 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
52 __stop___ex_table = .;
58 . = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
60 .data : AT(ADDR(.data) - LOAD_OFFSET) {
65 _edata = .; /* End of data section */
68 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
69 .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
70 *(.data.cacheline_aligned)
72 . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
73 .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
77 #define VSYSCALL_ADDR (-10*1024*1024)
78 #define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
79 #define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
81 #define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
82 #define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
84 #define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
85 #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
88 .vsyscall_0 : AT(VSYSCALL_PHYS_ADDR) { *(.vsyscall_0) } :user
89 __vsyscall_0 = VSYSCALL_VIRT_ADDR;
91 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
92 .vsyscall_fn : AT(VLOAD(.vsyscall_fn)) { *(.vsyscall_fn) }
93 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
94 .vsyscall_gtod_data : AT(VLOAD(.vsyscall_gtod_data))
95 { *(.vsyscall_gtod_data) }
96 vsyscall_gtod_data = VVIRT(.vsyscall_gtod_data);
98 .vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) { *(.vgetcpu_mode) }
99 vgetcpu_mode = VVIRT(.vgetcpu_mode);
101 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
102 .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
103 jiffies = VVIRT(.jiffies);
105 .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1))
107 .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2))
109 .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3))
112 . = VSYSCALL_VIRT_ADDR + 4096;
115 #undef VSYSCALL_PHYS_ADDR
116 #undef VSYSCALL_VIRT_ADDR
122 . = ALIGN(8192); /* init_task */
123 .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
128 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
129 *(.data.page_aligned)
132 /* might get freed after init */
135 __smp_alt_instructions = .;
136 .smp_altinstructions : AT(ADDR(.smp_altinstructions) - LOAD_OFFSET) {
137 *(.smp_altinstructions)
139 __smp_alt_instructions_end = .;
142 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
146 .smp_altinstr_replacement : AT(ADDR(.smp_altinstr_replacement) - LOAD_OFFSET) {
147 *(.smp_altinstr_replacement)
152 . = ALIGN(4096); /* Init code and data */
154 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
159 __initdata_begin = .;
160 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
164 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
166 __initcall_start = .;
167 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
171 __con_initcall_start = .;
172 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
173 *(.con_initcall.init)
175 __con_initcall_end = .;
178 __alt_instructions = .;
179 .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
182 __alt_instructions_end = .;
183 .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
184 *(.altinstr_replacement)
186 /* .exit.text is discard at runtime, not link time, to deal with references
187 from .altinstructions and .eh_frame */
188 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
189 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
191 #ifdef CONFIG_BLK_DEV_INITRD
193 __initramfs_start = .;
194 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
200 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) }
207 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
211 __bss_start = .; /* BSS */
212 .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
220 /* Sections to be discarded */