Commit | Line | Data |
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17ce265d SR |
1 | /* |
2 | * ld script for the x86 kernel | |
3 | * | |
4 | * Historic 32-bit version written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
5 | * | |
6 | * Modernisation and unification done by Sam Ravnborg <sam@ravnborg.org> | |
7 | * | |
8 | * | |
9 | * Don't define absolute symbols until and unless you know that symbol | |
10 | * value is should remain constant even if kernel image is relocated | |
11 | * at run time. Absolute symbols are not relocated. If symbol value should | |
12 | * change if kernel is relocated, make the symbol section relative and | |
13 | * put it inside the section definition. | |
14 | */ | |
15 | ||
16 | #ifdef CONFIG_X86_32 | |
17 | #define LOAD_OFFSET __PAGE_OFFSET | |
18 | #else | |
19 | #define LOAD_OFFSET __START_KERNEL_map | |
20 | #endif | |
21 | ||
22 | #include <asm-generic/vmlinux.lds.h> | |
23 | #include <asm/asm-offsets.h> | |
24 | #include <asm/thread_info.h> | |
25 | #include <asm/page_types.h> | |
26 | #include <asm/cache.h> | |
27 | #include <asm/boot.h> | |
28 | ||
29 | #undef i386 /* in case the preprocessor is a 32bit one */ | |
30 | ||
31 | OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT) | |
32 | ||
33 | #ifdef CONFIG_X86_32 | |
34 | OUTPUT_ARCH(i386) | |
35 | ENTRY(phys_startup_32) | |
36 | jiffies = jiffies_64; | |
37 | #else | |
38 | OUTPUT_ARCH(i386:x86-64) | |
39 | ENTRY(phys_startup_64) | |
40 | jiffies_64 = jiffies; | |
41 | #endif | |
42 | ||
afb8095a SR |
43 | PHDRS { |
44 | text PT_LOAD FLAGS(5); /* R_E */ | |
45 | data PT_LOAD FLAGS(7); /* RWE */ | |
46 | #ifdef CONFIG_X86_64 | |
47 | user PT_LOAD FLAGS(7); /* RWE */ | |
48 | data.init PT_LOAD FLAGS(7); /* RWE */ | |
49 | #ifdef CONFIG_SMP | |
50 | percpu PT_LOAD FLAGS(7); /* RWE */ | |
51 | #endif | |
52 | data.init2 PT_LOAD FLAGS(7); /* RWE */ | |
53 | #endif | |
54 | note PT_NOTE FLAGS(0); /* ___ */ | |
55 | } | |
17ce265d | 56 | |
444e0ae4 SR |
57 | SECTIONS |
58 | { | |
59 | #ifdef CONFIG_X86_32 | |
60 | . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR; | |
61 | phys_startup_32 = startup_32 - LOAD_OFFSET; | |
62 | #else | |
63 | . = __START_KERNEL; | |
64 | phys_startup_64 = startup_64 - LOAD_OFFSET; | |
65 | #endif | |
66 | ||
dfc20895 SR |
67 | /* Text and read-only data */ |
68 | ||
69 | /* bootstrapping code */ | |
70 | .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) { | |
71 | _text = .; | |
72 | *(.text.head) | |
73 | } :text = 0x9090 | |
74 | ||
75 | /* The rest of the text */ | |
76 | .text : AT(ADDR(.text) - LOAD_OFFSET) { | |
77 | #ifdef CONFIG_X86_32 | |
78 | /* not really needed, already page aligned */ | |
79 | . = ALIGN(PAGE_SIZE); | |
80 | *(.text.page_aligned) | |
81 | #endif | |
82 | . = ALIGN(8); | |
83 | _stext = .; | |
84 | TEXT_TEXT | |
85 | SCHED_TEXT | |
86 | LOCK_TEXT | |
87 | KPROBES_TEXT | |
88 | IRQENTRY_TEXT | |
89 | *(.fixup) | |
90 | *(.gnu.warning) | |
91 | /* End of text section */ | |
92 | _etext = .; | |
93 | } :text = 0x9090 | |
94 | ||
95 | NOTES :text :note | |
96 | ||
448bc3ab SR |
97 | /* Exception table */ |
98 | . = ALIGN(16); | |
99 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { | |
100 | __start___ex_table = .; | |
101 | *(__ex_table) | |
102 | __stop___ex_table = .; | |
103 | } :text = 0x9090 | |
104 | ||
105 | RODATA | |
106 | ||
dfc20895 | 107 | |
a60b778b TG |
108 | #ifdef CONFIG_X86_32 |
109 | # include "vmlinux_32.lds.S" | |
110 | #else | |
111 | # include "vmlinux_64.lds.S" | |
67d38229 | 112 | #endif |
17ce265d | 113 | |
444e0ae4 SR |
114 | STABS_DEBUG |
115 | DWARF_DEBUG | |
116 | } | |
117 | ||
17ce265d SR |
118 | |
119 | #ifdef CONFIG_X86_32 | |
120 | ASSERT((_end - LOAD_OFFSET <= KERNEL_IMAGE_SIZE), | |
121 | "kernel image bigger than KERNEL_IMAGE_SIZE") | |
122 | #else | |
123 | /* | |
124 | * Per-cpu symbols which need to be offset from __per_cpu_load | |
125 | * for the boot processor. | |
126 | */ | |
127 | #define INIT_PER_CPU(x) init_per_cpu__##x = per_cpu__##x + __per_cpu_load | |
128 | INIT_PER_CPU(gdt_page); | |
129 | INIT_PER_CPU(irq_stack_union); | |
130 | ||
131 | /* | |
132 | * Build-time check on the image size: | |
133 | */ | |
134 | ASSERT((_end - _text <= KERNEL_IMAGE_SIZE), | |
135 | "kernel image bigger than KERNEL_IMAGE_SIZE") | |
136 | ||
137 | #ifdef CONFIG_SMP | |
138 | ASSERT((per_cpu__irq_stack_union == 0), | |
139 | "irq_stack_union is not at start of per-cpu area"); | |
140 | #endif | |
141 | ||
142 | #endif /* CONFIG_X86_32 */ | |
143 | ||
144 | #ifdef CONFIG_KEXEC | |
145 | #include <asm/kexec.h> | |
146 | ||
147 | ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE, | |
148 | "kexec control code size is too big") | |
149 | #endif | |
150 |