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 = .;
56 . = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
58 .data : AT(ADDR(.data) - LOAD_OFFSET) {
63 _edata = .; /* End of data section */
66 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
67 .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
68 *(.data.cacheline_aligned)
70 . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
71 .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
75 #define VSYSCALL_ADDR (-10*1024*1024)
76 #define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
77 #define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
79 #define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
80 #define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
82 #define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
83 #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
86 .vsyscall_0 : AT(VSYSCALL_PHYS_ADDR) { *(.vsyscall_0) } :user
87 __vsyscall_0 = VSYSCALL_VIRT_ADDR;
89 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
90 .xtime_lock : AT(VLOAD(.xtime_lock)) { *(.xtime_lock) }
91 xtime_lock = VVIRT(.xtime_lock);
93 .vxtime : AT(VLOAD(.vxtime)) { *(.vxtime) }
94 vxtime = VVIRT(.vxtime);
96 .vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) { *(.vgetcpu_mode) }
97 vgetcpu_mode = VVIRT(.vgetcpu_mode);
99 .sys_tz : AT(VLOAD(.sys_tz)) { *(.sys_tz) }
100 sys_tz = VVIRT(.sys_tz);
102 .sysctl_vsyscall : AT(VLOAD(.sysctl_vsyscall)) { *(.sysctl_vsyscall) }
103 sysctl_vsyscall = VVIRT(.sysctl_vsyscall);
105 .xtime : AT(VLOAD(.xtime)) { *(.xtime) }
106 xtime = VVIRT(.xtime);
108 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
109 .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
110 jiffies = VVIRT(.jiffies);
112 .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1)) { *(.vsyscall_1) }
113 .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2)) { *(.vsyscall_2) }
114 .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3)) { *(.vsyscall_3) }
116 . = VSYSCALL_VIRT_ADDR + 4096;
119 #undef VSYSCALL_PHYS_ADDR
120 #undef VSYSCALL_VIRT_ADDR
126 . = ALIGN(8192); /* init_task */
127 .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
132 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
133 *(.data.page_aligned)
136 /* might get freed after init */
139 __smp_alt_instructions = .;
140 .smp_altinstructions : AT(ADDR(.smp_altinstructions) - LOAD_OFFSET) {
141 *(.smp_altinstructions)
143 __smp_alt_instructions_end = .;
146 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
150 .smp_altinstr_replacement : AT(ADDR(.smp_altinstr_replacement) - LOAD_OFFSET) {
151 *(.smp_altinstr_replacement)
156 . = ALIGN(4096); /* Init code and data */
158 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
163 __initdata_begin = .;
164 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
168 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
170 __initcall_start = .;
171 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
175 __con_initcall_start = .;
176 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
177 *(.con_initcall.init)
179 __con_initcall_end = .;
182 __alt_instructions = .;
183 .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
186 __alt_instructions_end = .;
187 .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
188 *(.altinstr_replacement)
190 /* .exit.text is discard at runtime, not link time, to deal with references
191 from .altinstructions and .eh_frame */
192 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
193 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
195 __initramfs_start = .;
196 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
198 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
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 */
223 #ifndef CONFIG_UNWIND_INFO