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>
9 #include <linux/config.h>
11 #undef i386 /* in case the preprocessor is a 32bit one */
13 OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
14 OUTPUT_ARCH(i386:x86-64)
15 ENTRY(phys_startup_64)
20 phys_startup_64 = startup_64 - LOAD_OFFSET;
21 _text = .; /* Text and read-only data */
22 .text : AT(ADDR(.text) - LOAD_OFFSET) {
23 /* First the code that has to be first for bootstrapping */
25 /* Then all the functions that are "hot" in profiles, to group them
26 onto the same hugetlb entry */
27 #include "functionlist"
36 /* out-of-line lock text */
37 .text.lock : AT(ADDR(.text.lock) - LOAD_OFFSET) { *(.text.lock) }
39 _etext = .; /* End of text section */
41 . = ALIGN(16); /* Exception table */
42 __start___ex_table = .;
43 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
44 __stop___ex_table = .;
48 #ifdef CONFIG_STACK_UNWIND
50 .eh_frame : AT(ADDR(.eh_frame) - LOAD_OFFSET) {
58 .data : AT(ADDR(.data) - LOAD_OFFSET) {
63 _edata = .; /* End of data section */
65 __bss_start = .; /* BSS */
66 .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
73 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
74 .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
75 *(.data.cacheline_aligned)
77 . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
78 .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
82 #define VSYSCALL_ADDR (-10*1024*1024)
83 #define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
84 #define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
86 #define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
87 #define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
89 #define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
90 #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
93 .vsyscall_0 : AT(VSYSCALL_PHYS_ADDR) { *(.vsyscall_0) }
94 __vsyscall_0 = VSYSCALL_VIRT_ADDR;
96 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
97 .xtime_lock : AT(VLOAD(.xtime_lock)) { *(.xtime_lock) }
98 xtime_lock = VVIRT(.xtime_lock);
100 .vxtime : AT(VLOAD(.vxtime)) { *(.vxtime) }
101 vxtime = VVIRT(.vxtime);
103 .wall_jiffies : AT(VLOAD(.wall_jiffies)) { *(.wall_jiffies) }
104 wall_jiffies = VVIRT(.wall_jiffies);
106 .sys_tz : AT(VLOAD(.sys_tz)) { *(.sys_tz) }
107 sys_tz = VVIRT(.sys_tz);
109 .sysctl_vsyscall : AT(VLOAD(.sysctl_vsyscall)) { *(.sysctl_vsyscall) }
110 sysctl_vsyscall = VVIRT(.sysctl_vsyscall);
112 .xtime : AT(VLOAD(.xtime)) { *(.xtime) }
113 xtime = VVIRT(.xtime);
115 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
116 .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
117 jiffies = VVIRT(.jiffies);
119 .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1)) { *(.vsyscall_1) }
120 .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2)) { *(.vsyscall_2) }
121 .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3)) { *(.vsyscall_3) }
123 . = VSYSCALL_VIRT_ADDR + 4096;
126 #undef VSYSCALL_PHYS_ADDR
127 #undef VSYSCALL_VIRT_ADDR
133 . = ALIGN(8192); /* init_task */
134 .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
139 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
140 *(.data.page_aligned)
143 /* might get freed after init */
146 __smp_alt_instructions = .;
147 .smp_altinstructions : AT(ADDR(.smp_altinstructions) - LOAD_OFFSET) {
148 *(.smp_altinstructions)
150 __smp_alt_instructions_end = .;
153 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
157 .smp_altinstr_replacement : AT(ADDR(.smp_altinstr_replacement) - LOAD_OFFSET) {
158 *(.smp_altinstr_replacement)
163 . = ALIGN(4096); /* Init code and data */
165 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
170 __initdata_begin = .;
171 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
175 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
177 __initcall_start = .;
178 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
188 __con_initcall_start = .;
189 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
190 *(.con_initcall.init)
192 __con_initcall_end = .;
195 __alt_instructions = .;
196 .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
199 __alt_instructions_end = .;
200 .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
201 *(.altinstr_replacement)
203 /* .exit.text is discard at runtime, not link time, to deal with references
204 from .altinstructions and .eh_frame */
205 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
206 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
208 __initramfs_start = .;
209 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
211 /* temporary here to work around NR_CPUS. If you see this comment in 2.6.17+
215 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
217 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) }
222 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
228 /* Sections to be discarded */
231 #ifndef CONFIG_UNWIND_INFO