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a60b778b TG |
1 | /* ld script to make i386 Linux kernel |
2 | * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>; | |
3 | * | |
4 | * Don't define absolute symbols until and unless you know that symbol | |
5 | * value is should remain constant even if kernel image is relocated | |
6 | * at run time. Absolute symbols are not relocated. If symbol value should | |
7 | * change if kernel is relocated, make the symbol section relative and | |
8 | * put it inside the section definition. | |
9 | */ | |
10 | ||
a60b778b TG |
11 | #define LOAD_OFFSET __PAGE_OFFSET |
12 | ||
13 | #include <asm-generic/vmlinux.lds.h> | |
14 | #include <asm/thread_info.h> | |
15 | #include <asm/page.h> | |
16 | #include <asm/cache.h> | |
17 | #include <asm/boot.h> | |
18 | ||
19 | OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") | |
20 | OUTPUT_ARCH(i386) | |
21 | ENTRY(phys_startup_32) | |
22 | jiffies = jiffies_64; | |
23 | ||
24 | PHDRS { | |
25 | text PT_LOAD FLAGS(5); /* R_E */ | |
26 | data PT_LOAD FLAGS(7); /* RWE */ | |
27 | note PT_NOTE FLAGS(0); /* ___ */ | |
28 | } | |
29 | SECTIONS | |
30 | { | |
31 | . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR; | |
32 | phys_startup_32 = startup_32 - LOAD_OFFSET; | |
33 | ||
34 | .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) { | |
35 | _text = .; /* Text and read-only data */ | |
36 | *(.text.head) | |
37 | } :text = 0x9090 | |
38 | ||
39 | /* read-only */ | |
40 | .text : AT(ADDR(.text) - LOAD_OFFSET) { | |
3cdac41f | 41 | . = ALIGN(PAGE_SIZE); /* not really needed, already page aligned */ |
4c491562 | 42 | *(.text.page_aligned) |
a60b778b TG |
43 | TEXT_TEXT |
44 | SCHED_TEXT | |
45 | LOCK_TEXT | |
46 | KPROBES_TEXT | |
47 | *(.fixup) | |
48 | *(.gnu.warning) | |
49 | _etext = .; /* End of text section */ | |
50 | } :text = 0x9090 | |
51 | ||
6360b1fb JB |
52 | NOTES :text :note |
53 | ||
a60b778b TG |
54 | . = ALIGN(16); /* Exception table */ |
55 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { | |
56 | __start___ex_table = .; | |
57 | *(__ex_table) | |
58 | __stop___ex_table = .; | |
6360b1fb | 59 | } :text = 0x9090 |
a60b778b | 60 | |
a60b778b TG |
61 | RODATA |
62 | ||
63 | /* writeable */ | |
3cdac41f | 64 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
65 | .data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */ |
66 | DATA_DATA | |
67 | CONSTRUCTORS | |
68 | } :data | |
69 | ||
3cdac41f | 70 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
71 | .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { |
72 | __nosave_begin = .; | |
73 | *(.data.nosave) | |
3cdac41f | 74 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
75 | __nosave_end = .; |
76 | } | |
77 | ||
3cdac41f | 78 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
79 | .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) { |
80 | *(.data.page_aligned) | |
81 | *(.data.idt) | |
82 | } | |
83 | ||
84 | . = ALIGN(32); | |
85 | .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) { | |
86 | *(.data.cacheline_aligned) | |
87 | } | |
88 | ||
89 | /* rarely changed data like cpu maps */ | |
90 | . = ALIGN(32); | |
91 | .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) { | |
92 | *(.data.read_mostly) | |
93 | _edata = .; /* End of data section */ | |
94 | } | |
95 | ||
96 | . = ALIGN(THREAD_SIZE); /* init_task */ | |
97 | .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) { | |
98 | *(.data.init_task) | |
99 | } | |
100 | ||
101 | /* might get freed after init */ | |
3cdac41f | 102 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
103 | .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) { |
104 | __smp_locks = .; | |
105 | *(.smp_locks) | |
106 | __smp_locks_end = .; | |
107 | } | |
108 | /* will be freed after init | |
109 | * Following ALIGN() is required to make sure no other data falls on the | |
110 | * same page where __smp_alt_end is pointing as that page might be freed | |
111 | * after boot. Always make sure that ALIGN() directive is present after | |
112 | * the section which contains __smp_alt_end. | |
113 | */ | |
3cdac41f | 114 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
115 | |
116 | /* will be freed after init */ | |
3cdac41f | 117 | . = ALIGN(PAGE_SIZE); /* Init code and data */ |
a60b778b TG |
118 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { |
119 | __init_begin = .; | |
120 | _sinittext = .; | |
01ba2bdc | 121 | INIT_TEXT |
a60b778b TG |
122 | _einittext = .; |
123 | } | |
01ba2bdc SR |
124 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { |
125 | INIT_DATA | |
126 | } | |
a60b778b TG |
127 | . = ALIGN(16); |
128 | .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { | |
129 | __setup_start = .; | |
130 | *(.init.setup) | |
131 | __setup_end = .; | |
132 | } | |
133 | .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) { | |
134 | __initcall_start = .; | |
135 | INITCALLS | |
136 | __initcall_end = .; | |
137 | } | |
138 | .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) { | |
139 | __con_initcall_start = .; | |
140 | *(.con_initcall.init) | |
141 | __con_initcall_end = .; | |
142 | } | |
10a434fc YL |
143 | .x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) { |
144 | __x86_cpu_dev_start = .; | |
145 | *(.x86_cpu_dev.init) | |
146 | __x86_cpu_dev_end = .; | |
03ae5768 | 147 | } |
a60b778b TG |
148 | SECURITY_INIT |
149 | . = ALIGN(4); | |
150 | .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) { | |
151 | __alt_instructions = .; | |
152 | *(.altinstructions) | |
153 | __alt_instructions_end = .; | |
154 | } | |
155 | .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) { | |
156 | *(.altinstr_replacement) | |
157 | } | |
158 | . = ALIGN(4); | |
159 | .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) { | |
160 | __parainstructions = .; | |
161 | *(.parainstructions) | |
162 | __parainstructions_end = .; | |
163 | } | |
164 | /* .exit.text is discard at runtime, not link time, to deal with references | |
165 | from .altinstructions and .eh_frame */ | |
01ba2bdc SR |
166 | .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { |
167 | EXIT_TEXT | |
168 | } | |
169 | .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { | |
170 | EXIT_DATA | |
171 | } | |
a60b778b | 172 | #if defined(CONFIG_BLK_DEV_INITRD) |
3cdac41f | 173 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
174 | .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { |
175 | __initramfs_start = .; | |
176 | *(.init.ramfs) | |
177 | __initramfs_end = .; | |
178 | } | |
179 | #endif | |
3cdac41f | 180 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
181 | .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { |
182 | __per_cpu_start = .; | |
63cc8c75 | 183 | *(.data.percpu.page_aligned) |
a60b778b TG |
184 | *(.data.percpu) |
185 | *(.data.percpu.shared_aligned) | |
186 | __per_cpu_end = .; | |
187 | } | |
3cdac41f | 188 | . = ALIGN(PAGE_SIZE); |
a60b778b | 189 | /* freed after init ends here */ |
3cdac41f | 190 | |
a60b778b TG |
191 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { |
192 | __init_end = .; | |
193 | __bss_start = .; /* BSS */ | |
194 | *(.bss.page_aligned) | |
195 | *(.bss) | |
196 | . = ALIGN(4); | |
197 | __bss_stop = .; | |
198 | _end = . ; | |
199 | /* This is where the kernel creates the early boot page tables */ | |
3cdac41f | 200 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
201 | pg0 = . ; |
202 | } | |
203 | ||
204 | /* Sections to be discarded */ | |
205 | /DISCARD/ : { | |
206 | *(.exitcall.exit) | |
207 | } | |
208 | ||
209 | STABS_DEBUG | |
210 | ||
211 | DWARF_DEBUG | |
212 | } | |
fb45daa6 HY |
213 | |
214 | #ifdef CONFIG_KEXEC | |
215 | /* Link time checks */ | |
216 | #include <asm/kexec.h> | |
217 | ||
218 | ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE, | |
219 | "kexec control code size is too big") | |
220 | #endif |