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)
17 text PT_LOAD FLAGS(5); /* R_E */
18 data PT_LOAD FLAGS(7); /* RWE */
19 user PT_LOAD FLAGS(7); /* RWE */
20 data.init PT_LOAD FLAGS(7); /* RWE */
21 note PT_NOTE FLAGS(4); /* R__ */
26 phys_startup_64 = startup_64 - LOAD_OFFSET;
27 _text = .; /* Text and read-only data */
28 .text : AT(ADDR(.text) - LOAD_OFFSET) {
29 /* First the code that has to be first for bootstrapping */
31 /* Then all the functions that are "hot" in profiles, to group them
32 onto the same hugetlb entry */
33 #include "functionlist"
42 /* out-of-line lock text */
43 .text.lock : AT(ADDR(.text.lock) - LOAD_OFFSET) { *(.text.lock) }
45 _etext = .; /* End of text section */
47 . = ALIGN(16); /* Exception table */
48 __start___ex_table = .;
49 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
50 __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 .xtime_lock : AT(VLOAD(.xtime_lock)) { *(.xtime_lock) }
89 xtime_lock = VVIRT(.xtime_lock);
91 .vxtime : AT(VLOAD(.vxtime)) { *(.vxtime) }
92 vxtime = VVIRT(.vxtime);
94 .vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) { *(.vgetcpu_mode) }
95 vgetcpu_mode = VVIRT(.vgetcpu_mode);
97 .sys_tz : AT(VLOAD(.sys_tz)) { *(.sys_tz) }
98 sys_tz = VVIRT(.sys_tz);
100 .sysctl_vsyscall : AT(VLOAD(.sysctl_vsyscall)) { *(.sysctl_vsyscall) }
101 sysctl_vsyscall = VVIRT(.sysctl_vsyscall);
103 .xtime : AT(VLOAD(.xtime)) { *(.xtime) }
104 xtime = VVIRT(.xtime);
106 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
107 .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
108 jiffies = VVIRT(.jiffies);
110 .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1)) { *(.vsyscall_1) }
111 .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2)) { *(.vsyscall_2) }
112 .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3)) { *(.vsyscall_3) }
114 . = VSYSCALL_VIRT_ADDR + 4096;
117 #undef VSYSCALL_PHYS_ADDR
118 #undef VSYSCALL_VIRT_ADDR
124 . = ALIGN(8192); /* init_task */
125 .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
130 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
131 *(.data.page_aligned)
134 /* might get freed after init */
137 __smp_alt_instructions = .;
138 .smp_altinstructions : AT(ADDR(.smp_altinstructions) - LOAD_OFFSET) {
139 *(.smp_altinstructions)
141 __smp_alt_instructions_end = .;
144 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
148 .smp_altinstr_replacement : AT(ADDR(.smp_altinstr_replacement) - LOAD_OFFSET) {
149 *(.smp_altinstr_replacement)
154 . = ALIGN(4096); /* Init code and data */
156 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
161 __initdata_begin = .;
162 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
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 = .;
180 __alt_instructions = .;
181 .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
184 __alt_instructions_end = .;
185 .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
186 *(.altinstr_replacement)
188 /* .exit.text is discard at runtime, not link time, to deal with references
189 from .altinstructions and .eh_frame */
190 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
191 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
193 __initramfs_start = .;
194 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
196 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
198 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) }
205 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
209 __bss_start = .; /* BSS */
210 .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
218 /* Sections to be discarded */
221 #ifndef CONFIG_UNWIND_INFO