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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 | ||
52 | . = ALIGN(16); /* Exception table */ | |
53 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { | |
54 | __start___ex_table = .; | |
55 | *(__ex_table) | |
56 | __stop___ex_table = .; | |
57 | } | |
58 | ||
59 | NOTES :text :note | |
60 | ||
61 | BUG_TABLE :text | |
62 | ||
63 | . = ALIGN(4); | |
64 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { | |
65 | __tracedata_start = .; | |
66 | *(.tracedata) | |
67 | __tracedata_end = .; | |
68 | } | |
69 | ||
70 | RODATA | |
71 | ||
72 | /* writeable */ | |
3cdac41f | 73 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
74 | .data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */ |
75 | DATA_DATA | |
76 | CONSTRUCTORS | |
77 | } :data | |
78 | ||
3cdac41f | 79 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
80 | .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { |
81 | __nosave_begin = .; | |
82 | *(.data.nosave) | |
3cdac41f | 83 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
84 | __nosave_end = .; |
85 | } | |
86 | ||
3cdac41f | 87 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
88 | .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) { |
89 | *(.data.page_aligned) | |
90 | *(.data.idt) | |
91 | } | |
92 | ||
93 | . = ALIGN(32); | |
94 | .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) { | |
95 | *(.data.cacheline_aligned) | |
96 | } | |
97 | ||
98 | /* rarely changed data like cpu maps */ | |
99 | . = ALIGN(32); | |
100 | .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) { | |
101 | *(.data.read_mostly) | |
102 | _edata = .; /* End of data section */ | |
103 | } | |
104 | ||
105 | . = ALIGN(THREAD_SIZE); /* init_task */ | |
106 | .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) { | |
107 | *(.data.init_task) | |
108 | } | |
109 | ||
110 | /* might get freed after init */ | |
3cdac41f | 111 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
112 | .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) { |
113 | __smp_locks = .; | |
114 | *(.smp_locks) | |
115 | __smp_locks_end = .; | |
116 | } | |
117 | /* will be freed after init | |
118 | * Following ALIGN() is required to make sure no other data falls on the | |
119 | * same page where __smp_alt_end is pointing as that page might be freed | |
120 | * after boot. Always make sure that ALIGN() directive is present after | |
121 | * the section which contains __smp_alt_end. | |
122 | */ | |
3cdac41f | 123 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
124 | |
125 | /* will be freed after init */ | |
3cdac41f | 126 | . = ALIGN(PAGE_SIZE); /* Init code and data */ |
a60b778b TG |
127 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { |
128 | __init_begin = .; | |
129 | _sinittext = .; | |
01ba2bdc | 130 | INIT_TEXT |
a60b778b TG |
131 | _einittext = .; |
132 | } | |
01ba2bdc SR |
133 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { |
134 | INIT_DATA | |
135 | } | |
a60b778b TG |
136 | . = ALIGN(16); |
137 | .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { | |
138 | __setup_start = .; | |
139 | *(.init.setup) | |
140 | __setup_end = .; | |
141 | } | |
142 | .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) { | |
143 | __initcall_start = .; | |
144 | INITCALLS | |
145 | __initcall_end = .; | |
146 | } | |
147 | .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) { | |
148 | __con_initcall_start = .; | |
149 | *(.con_initcall.init) | |
150 | __con_initcall_end = .; | |
151 | } | |
03ae5768 TP |
152 | .x86cpuvendor.init : AT(ADDR(.x86cpuvendor.init) - LOAD_OFFSET) { |
153 | __x86cpuvendor_start = .; | |
154 | *(.x86cpuvendor.init) | |
155 | __x86cpuvendor_end = .; | |
156 | } | |
a60b778b TG |
157 | SECURITY_INIT |
158 | . = ALIGN(4); | |
159 | .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) { | |
160 | __alt_instructions = .; | |
161 | *(.altinstructions) | |
162 | __alt_instructions_end = .; | |
163 | } | |
164 | .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) { | |
165 | *(.altinstr_replacement) | |
166 | } | |
167 | . = ALIGN(4); | |
168 | .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) { | |
169 | __parainstructions = .; | |
170 | *(.parainstructions) | |
171 | __parainstructions_end = .; | |
172 | } | |
173 | /* .exit.text is discard at runtime, not link time, to deal with references | |
174 | from .altinstructions and .eh_frame */ | |
01ba2bdc SR |
175 | .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { |
176 | EXIT_TEXT | |
177 | } | |
178 | .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { | |
179 | EXIT_DATA | |
180 | } | |
a60b778b | 181 | #if defined(CONFIG_BLK_DEV_INITRD) |
3cdac41f | 182 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
183 | .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { |
184 | __initramfs_start = .; | |
185 | *(.init.ramfs) | |
186 | __initramfs_end = .; | |
187 | } | |
188 | #endif | |
3cdac41f | 189 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
190 | .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { |
191 | __per_cpu_start = .; | |
192 | *(.data.percpu) | |
193 | *(.data.percpu.shared_aligned) | |
194 | __per_cpu_end = .; | |
195 | } | |
3cdac41f | 196 | . = ALIGN(PAGE_SIZE); |
a60b778b | 197 | /* freed after init ends here */ |
3cdac41f | 198 | |
a60b778b TG |
199 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { |
200 | __init_end = .; | |
201 | __bss_start = .; /* BSS */ | |
202 | *(.bss.page_aligned) | |
203 | *(.bss) | |
204 | . = ALIGN(4); | |
205 | __bss_stop = .; | |
206 | _end = . ; | |
207 | /* This is where the kernel creates the early boot page tables */ | |
3cdac41f | 208 | . = ALIGN(PAGE_SIZE); |
a60b778b TG |
209 | pg0 = . ; |
210 | } | |
211 | ||
212 | /* Sections to be discarded */ | |
213 | /DISCARD/ : { | |
214 | *(.exitcall.exit) | |
215 | } | |
216 | ||
217 | STABS_DEBUG | |
218 | ||
219 | DWARF_DEBUG | |
220 | } |