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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 | ||
11 | /* Don't define absolute symbols until and unless you know that symbol | |
12 | * value is should remain constant even if kernel image is relocated | |
13 | * at run time. Absolute symbols are not relocated. If symbol value should | |
14 | * change if kernel is relocated, make the symbol section relative and | |
15 | * put it inside the section definition. | |
16 | */ | |
17 | #define LOAD_OFFSET __PAGE_OFFSET | |
18 | ||
19 | #include <asm-generic/vmlinux.lds.h> | |
20 | #include <asm/thread_info.h> | |
21 | #include <asm/page.h> | |
22 | #include <asm/cache.h> | |
23 | #include <asm/boot.h> | |
24 | ||
25 | OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") | |
26 | OUTPUT_ARCH(i386) | |
27 | ENTRY(phys_startup_32) | |
28 | jiffies = jiffies_64; | |
29 | ||
30 | PHDRS { | |
31 | text PT_LOAD FLAGS(5); /* R_E */ | |
32 | data PT_LOAD FLAGS(7); /* RWE */ | |
33 | note PT_NOTE FLAGS(0); /* ___ */ | |
34 | } | |
35 | SECTIONS | |
36 | { | |
37 | . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR; | |
38 | phys_startup_32 = startup_32 - LOAD_OFFSET; | |
39 | ||
40 | .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) { | |
41 | _text = .; /* Text and read-only data */ | |
42 | *(.text.head) | |
43 | } :text = 0x9090 | |
44 | ||
45 | /* read-only */ | |
46 | .text : AT(ADDR(.text) - LOAD_OFFSET) { | |
47 | TEXT_TEXT | |
48 | SCHED_TEXT | |
49 | LOCK_TEXT | |
50 | KPROBES_TEXT | |
51 | *(.fixup) | |
52 | *(.gnu.warning) | |
53 | _etext = .; /* End of text section */ | |
54 | } :text = 0x9090 | |
55 | ||
56 | . = ALIGN(16); /* Exception table */ | |
57 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { | |
58 | __start___ex_table = .; | |
59 | *(__ex_table) | |
60 | __stop___ex_table = .; | |
61 | } | |
62 | ||
63 | NOTES :text :note | |
64 | ||
65 | BUG_TABLE :text | |
66 | ||
67 | . = ALIGN(4); | |
68 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { | |
69 | __tracedata_start = .; | |
70 | *(.tracedata) | |
71 | __tracedata_end = .; | |
72 | } | |
73 | ||
74 | RODATA | |
75 | ||
76 | /* writeable */ | |
77 | . = ALIGN(4096); | |
78 | .data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */ | |
79 | DATA_DATA | |
80 | CONSTRUCTORS | |
81 | } :data | |
82 | ||
83 | . = ALIGN(4096); | |
84 | .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { | |
85 | __nosave_begin = .; | |
86 | *(.data.nosave) | |
87 | . = ALIGN(4096); | |
88 | __nosave_end = .; | |
89 | } | |
90 | ||
91 | . = ALIGN(4096); | |
92 | .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) { | |
93 | *(.data.page_aligned) | |
94 | *(.data.idt) | |
95 | } | |
96 | ||
97 | . = ALIGN(32); | |
98 | .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) { | |
99 | *(.data.cacheline_aligned) | |
100 | } | |
101 | ||
102 | /* rarely changed data like cpu maps */ | |
103 | . = ALIGN(32); | |
104 | .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) { | |
105 | *(.data.read_mostly) | |
106 | _edata = .; /* End of data section */ | |
107 | } | |
108 | ||
109 | . = ALIGN(THREAD_SIZE); /* init_task */ | |
110 | .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) { | |
111 | *(.data.init_task) | |
112 | } | |
113 | ||
114 | /* might get freed after init */ | |
115 | . = ALIGN(4096); | |
116 | .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) { | |
117 | __smp_locks = .; | |
118 | *(.smp_locks) | |
119 | __smp_locks_end = .; | |
120 | } | |
121 | /* will be freed after init | |
122 | * Following ALIGN() is required to make sure no other data falls on the | |
123 | * same page where __smp_alt_end is pointing as that page might be freed | |
124 | * after boot. Always make sure that ALIGN() directive is present after | |
125 | * the section which contains __smp_alt_end. | |
126 | */ | |
127 | . = ALIGN(4096); | |
128 | ||
129 | /* will be freed after init */ | |
130 | . = ALIGN(4096); /* Init code and data */ | |
131 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { | |
132 | __init_begin = .; | |
133 | _sinittext = .; | |
01ba2bdc | 134 | INIT_TEXT |
a60b778b TG |
135 | _einittext = .; |
136 | } | |
01ba2bdc SR |
137 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { |
138 | INIT_DATA | |
139 | } | |
a60b778b TG |
140 | . = ALIGN(16); |
141 | .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { | |
142 | __setup_start = .; | |
143 | *(.init.setup) | |
144 | __setup_end = .; | |
145 | } | |
146 | .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) { | |
147 | __initcall_start = .; | |
148 | INITCALLS | |
149 | __initcall_end = .; | |
150 | } | |
151 | .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) { | |
152 | __con_initcall_start = .; | |
153 | *(.con_initcall.init) | |
154 | __con_initcall_end = .; | |
155 | } | |
156 | SECURITY_INIT | |
157 | . = ALIGN(4); | |
158 | .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) { | |
159 | __alt_instructions = .; | |
160 | *(.altinstructions) | |
161 | __alt_instructions_end = .; | |
162 | } | |
163 | .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) { | |
164 | *(.altinstr_replacement) | |
165 | } | |
166 | . = ALIGN(4); | |
167 | .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) { | |
168 | __parainstructions = .; | |
169 | *(.parainstructions) | |
170 | __parainstructions_end = .; | |
171 | } | |
172 | /* .exit.text is discard at runtime, not link time, to deal with references | |
173 | from .altinstructions and .eh_frame */ | |
01ba2bdc SR |
174 | .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { |
175 | EXIT_TEXT | |
176 | } | |
177 | .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { | |
178 | EXIT_DATA | |
179 | } | |
a60b778b TG |
180 | #if defined(CONFIG_BLK_DEV_INITRD) |
181 | . = ALIGN(4096); | |
182 | .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { | |
183 | __initramfs_start = .; | |
184 | *(.init.ramfs) | |
185 | __initramfs_end = .; | |
186 | } | |
187 | #endif | |
188 | . = ALIGN(4096); | |
189 | .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { | |
190 | __per_cpu_start = .; | |
191 | *(.data.percpu) | |
192 | *(.data.percpu.shared_aligned) | |
193 | __per_cpu_end = .; | |
194 | } | |
195 | . = ALIGN(4096); | |
196 | /* freed after init ends here */ | |
197 | ||
198 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { | |
199 | __init_end = .; | |
200 | __bss_start = .; /* BSS */ | |
201 | *(.bss.page_aligned) | |
202 | *(.bss) | |
203 | . = ALIGN(4); | |
204 | __bss_stop = .; | |
205 | _end = . ; | |
206 | /* This is where the kernel creates the early boot page tables */ | |
207 | . = ALIGN(4096); | |
208 | pg0 = . ; | |
209 | } | |
210 | ||
211 | /* Sections to be discarded */ | |
212 | /DISCARD/ : { | |
213 | *(.exitcall.exit) | |
214 | } | |
215 | ||
216 | STABS_DEBUG | |
217 | ||
218 | DWARF_DEBUG | |
219 | } |