Commit | Line | Data |
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8c2c3df3 CM |
1 | /* |
2 | * ld script to make ARM Linux kernel | |
3 | * taken from the i386 version by Russell King | |
4 | * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
5 | */ | |
6 | ||
7 | #include <asm-generic/vmlinux.lds.h> | |
98fb7548 | 8 | #include <asm/cache.h> |
87d1587b | 9 | #include <asm/kernel-pgtable.h> |
8c2c3df3 CM |
10 | #include <asm/thread_info.h> |
11 | #include <asm/memory.h> | |
12 | #include <asm/page.h> | |
da141706 | 13 | #include <asm/pgtable.h> |
8c2c3df3 | 14 | |
a2c1d73b MR |
15 | #include "image.h" |
16 | ||
07c802bd WD |
17 | /* .exit.text needed in case of alternative patching */ |
18 | #define ARM_EXIT_KEEP(x) x | |
19 | #define ARM_EXIT_DISCARD(x) | |
8c2c3df3 CM |
20 | |
21 | OUTPUT_ARCH(aarch64) | |
af885f40 | 22 | ENTRY(_text) |
8c2c3df3 CM |
23 | |
24 | jiffies = jiffies_64; | |
25 | ||
2240bbb6 MZ |
26 | #define HYPERVISOR_TEXT \ |
27 | /* \ | |
06f75a1f AB |
28 | * Align to 4 KB so that \ |
29 | * a) the HYP vector table is at its minimum \ | |
30 | * alignment of 2048 bytes \ | |
31 | * b) the HYP init code will not cross a page \ | |
32 | * boundary if its size does not exceed \ | |
33 | * 4 KB (see related ASSERT() below) \ | |
2240bbb6 | 34 | */ \ |
06f75a1f | 35 | . = ALIGN(SZ_4K); \ |
2240bbb6 MZ |
36 | VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ |
37 | *(.hyp.idmap.text) \ | |
38 | VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; \ | |
39 | VMLINUX_SYMBOL(__hyp_text_start) = .; \ | |
40 | *(.hyp.text) \ | |
41 | VMLINUX_SYMBOL(__hyp_text_end) = .; | |
42 | ||
5dfe9d7d AB |
43 | #define IDMAP_TEXT \ |
44 | . = ALIGN(SZ_4K); \ | |
45 | VMLINUX_SYMBOL(__idmap_text_start) = .; \ | |
46 | *(.idmap.text) \ | |
47 | VMLINUX_SYMBOL(__idmap_text_end) = .; | |
48 | ||
82869ac5 JM |
49 | #ifdef CONFIG_HIBERNATION |
50 | #define HIBERNATE_TEXT \ | |
51 | . = ALIGN(SZ_4K); \ | |
52 | VMLINUX_SYMBOL(__hibernate_exit_text_start) = .;\ | |
53 | *(.hibernate_exit.text) \ | |
54 | VMLINUX_SYMBOL(__hibernate_exit_text_end) = .; | |
55 | #else | |
56 | #define HIBERNATE_TEXT | |
57 | #endif | |
58 | ||
a352ea3e AB |
59 | /* |
60 | * The size of the PE/COFF section that covers the kernel image, which | |
61 | * runs from stext to _edata, must be a round multiple of the PE/COFF | |
62 | * FileAlignment, which we set to its minimum value of 0x200. 'stext' | |
63 | * itself is 4 KB aligned, so padding out _edata to a 0x200 aligned | |
64 | * boundary should be sufficient. | |
65 | */ | |
66 | PECOFF_FILE_ALIGNMENT = 0x200; | |
67 | ||
68 | #ifdef CONFIG_EFI | |
69 | #define PECOFF_EDATA_PADDING \ | |
70 | .pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); } | |
71 | #else | |
72 | #define PECOFF_EDATA_PADDING | |
73 | #endif | |
74 | ||
cb083816 | 75 | #if defined(CONFIG_DEBUG_ALIGN_RODATA) |
97740051 AB |
76 | /* |
77 | * 4 KB granule: 1 level 2 entry | |
78 | * 16 KB granule: 128 level 3 entries, with contiguous bit | |
79 | * 64 KB granule: 32 level 3 entries, with contiguous bit | |
80 | */ | |
81 | #define SEGMENT_ALIGN SZ_2M | |
da141706 | 82 | #else |
97740051 AB |
83 | /* |
84 | * 4 KB granule: 16 level 3 entries, with contiguous bit | |
85 | * 16 KB granule: 4 level 3 entries, without contiguous bit | |
86 | * 64 KB granule: 1 level 3 entry | |
87 | */ | |
88 | #define SEGMENT_ALIGN SZ_64K | |
da141706 LA |
89 | #endif |
90 | ||
8c2c3df3 CM |
91 | SECTIONS |
92 | { | |
93 | /* | |
94 | * XXX: The linker does not define how output sections are | |
95 | * assigned to input sections when there are multiple statements | |
96 | * matching the same input section name. There is no documented | |
97 | * order of matching. | |
98 | */ | |
99 | /DISCARD/ : { | |
100 | ARM_EXIT_DISCARD(EXIT_TEXT) | |
101 | ARM_EXIT_DISCARD(EXIT_DATA) | |
102 | EXIT_CALL | |
103 | *(.discard) | |
104 | *(.discard.*) | |
1e48ef7f | 105 | *(.interp .dynamic) |
8c2c3df3 CM |
106 | } |
107 | ||
ab893fb9 | 108 | . = KIMAGE_VADDR + TEXT_OFFSET; |
8c2c3df3 CM |
109 | |
110 | .head.text : { | |
111 | _text = .; | |
112 | HEAD_TEXT | |
113 | } | |
114 | .text : { /* Real text segment */ | |
115 | _stext = .; /* Text and read-only data */ | |
8c2c3df3 CM |
116 | __exception_text_start = .; |
117 | *(.exception.text) | |
118 | __exception_text_end = .; | |
119 | IRQENTRY_TEXT | |
be7635e7 | 120 | SOFTIRQENTRY_TEXT |
8c2c3df3 CM |
121 | TEXT_TEXT |
122 | SCHED_TEXT | |
123 | LOCK_TEXT | |
2240bbb6 | 124 | HYPERVISOR_TEXT |
5dfe9d7d | 125 | IDMAP_TEXT |
82869ac5 | 126 | HIBERNATE_TEXT |
8c2c3df3 CM |
127 | *(.fixup) |
128 | *(.gnu.warning) | |
129 | . = ALIGN(16); | |
130 | *(.got) /* Global offset table */ | |
131 | } | |
132 | ||
97740051 | 133 | . = ALIGN(SEGMENT_ALIGN); |
2f39b5f9 JL |
134 | RO_DATA(PAGE_SIZE) /* everything from this point to */ |
135 | EXCEPTION_TABLE(8) /* _etext will be marked RO NX */ | |
c80b7ee8 | 136 | NOTES |
8c2c3df3 | 137 | |
97740051 | 138 | . = ALIGN(SEGMENT_ALIGN); |
fca082bf | 139 | _etext = .; /* End of text and rodata section */ |
8c2c3df3 CM |
140 | __init_begin = .; |
141 | ||
142 | INIT_TEXT_SECTION(8) | |
143 | .exit.text : { | |
144 | ARM_EXIT_KEEP(EXIT_TEXT) | |
145 | } | |
da141706 | 146 | |
8c2c3df3 CM |
147 | .init.data : { |
148 | INIT_DATA | |
149 | INIT_SETUP(16) | |
150 | INIT_CALLS | |
151 | CON_INITCALL | |
152 | SECURITY_INITCALL | |
153 | INIT_RAM_FS | |
1ce99bf4 | 154 | *(.init.rodata.* .init.bss) /* from the EFI stub */ |
8c2c3df3 CM |
155 | } |
156 | .exit.data : { | |
157 | ARM_EXIT_KEEP(EXIT_DATA) | |
158 | } | |
159 | ||
98fb7548 | 160 | PERCPU_SECTION(L1_CACHE_BYTES) |
8c2c3df3 | 161 | |
e039ee4e AP |
162 | . = ALIGN(4); |
163 | .altinstructions : { | |
164 | __alt_instructions = .; | |
165 | *(.altinstructions) | |
166 | __alt_instructions_end = .; | |
167 | } | |
168 | .altinstr_replacement : { | |
169 | *(.altinstr_replacement) | |
170 | } | |
1e48ef7f | 171 | .rela : ALIGN(8) { |
1e48ef7f | 172 | *(.rela .rela*) |
1e48ef7f AB |
173 | } |
174 | .dynsym : ALIGN(8) { | |
1e48ef7f AB |
175 | *(.dynsym) |
176 | } | |
177 | .dynstr : { | |
178 | *(.dynstr) | |
179 | } | |
180 | .hash : { | |
181 | *(.hash) | |
182 | } | |
e039ee4e | 183 | |
0cd3defe AB |
184 | __rela_offset = ADDR(.rela) - KIMAGE_VADDR; |
185 | __rela_size = SIZEOF(.rela); | |
186 | __dynsym_offset = ADDR(.dynsym) - KIMAGE_VADDR; | |
187 | ||
97740051 | 188 | . = ALIGN(SEGMENT_ALIGN); |
9aa4ec15 MR |
189 | __init_end = .; |
190 | ||
3c620626 | 191 | _data = .; |
3c620626 | 192 | _sdata = .; |
98fb7548 | 193 | RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) |
a352ea3e | 194 | PECOFF_EDATA_PADDING |
3c620626 | 195 | _edata = .; |
8c2c3df3 | 196 | |
8c2c3df3 | 197 | BSS_SECTION(0, 0, 0) |
bd00cd5f MR |
198 | |
199 | . = ALIGN(PAGE_SIZE); | |
200 | idmap_pg_dir = .; | |
201 | . += IDMAP_DIR_SIZE; | |
202 | swapper_pg_dir = .; | |
203 | . += SWAPPER_DIR_SIZE; | |
204 | ||
8c2c3df3 CM |
205 | _end = .; |
206 | ||
207 | STABS_DEBUG | |
a2c1d73b MR |
208 | |
209 | HEAD_SYMBOLS | |
8c2c3df3 | 210 | } |
2240bbb6 MZ |
211 | |
212 | /* | |
5dfe9d7d | 213 | * The HYP init code and ID map text can't be longer than a page each, |
06f75a1f | 214 | * and should not cross a page boundary. |
2240bbb6 | 215 | */ |
06f75a1f AB |
216 | ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K, |
217 | "HYP init code too big or misaligned") | |
5dfe9d7d AB |
218 | ASSERT(__idmap_text_end - (__idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K, |
219 | "ID map text too big or misaligned") | |
82869ac5 JM |
220 | #ifdef CONFIG_HIBERNATION |
221 | ASSERT(__hibernate_exit_text_end - (__hibernate_exit_text_start & ~(SZ_4K - 1)) | |
222 | <= SZ_4K, "Hibernate exit text too big or misaligned") | |
223 | #endif | |
da57a369 MR |
224 | |
225 | /* | |
226 | * If padding is applied before .head.text, virt<->phys conversions will fail. | |
227 | */ | |
ab893fb9 | 228 | ASSERT(_text == (KIMAGE_VADDR + TEXT_OFFSET), "HEAD is misaligned") |