1 /* ld script to make x86-64 LWK kernel
2 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
5 #define LOAD_OFFSET __START_KERNEL_map
7 #include <arch-generic/vmlwk.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 */
40 /* out-of-line lock text */
41 .text.lock : AT(ADDR(.text.lock) - LOAD_OFFSET) { *(.text.lock) }
43 _etext = .; /* End of text section */
45 . = ALIGN(16); /* Exception table */
46 __start___ex_table = .;
47 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
48 __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 .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1))
90 .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2))
93 .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3))
96 . = VSYSCALL_VIRT_ADDR + PAGE_SIZE;
99 #undef VSYSCALL_PHYS_ADDR
100 #undef VSYSCALL_VIRT_ADDR
106 . = ALIGN(8192); /* bootstrap_task */
107 .data.bootstrap_task : AT(ADDR(.data.bootstrap_task) - LOAD_OFFSET) {
108 *(.data.bootstrap_task)
112 .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
113 *(.data.page_aligned)
116 /* might get freed after init */
119 __smp_alt_instructions = .;
120 .smp_altinstructions : AT(ADDR(.smp_altinstructions) - LOAD_OFFSET) {
121 *(.smp_altinstructions)
123 __smp_alt_instructions_end = .;
126 .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
130 .smp_altinstr_replacement : AT(ADDR(.smp_altinstr_replacement) - LOAD_OFFSET) {
131 *(.smp_altinstr_replacement)
136 . = ALIGN(4096); /* Init code and data */
138 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
143 __initdata_begin = .;
144 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
148 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
150 __initcall_start = .;
151 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
155 __con_initcall_start = .;
156 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
157 *(.con_initcall.init)
159 __con_initcall_end = .;
162 __alt_instructions = .;
163 .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
166 __alt_instructions_end = .;
167 .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
168 *(.altinstr_replacement)
170 /* .exit.text is discard at runtime, not link time, to deal with references
171 from .altinstructions and .eh_frame */
172 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
173 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
175 #ifdef CONFIG_BLK_DEV_INITRD
177 __initramfs_start = .;
178 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
184 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) }
191 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
195 __bss_start = .; /* BSS */
196 .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
204 /* Sections to be discarded */