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 | ||
a352ea3e AB |
49 | /* |
50 | * The size of the PE/COFF section that covers the kernel image, which | |
51 | * runs from stext to _edata, must be a round multiple of the PE/COFF | |
52 | * FileAlignment, which we set to its minimum value of 0x200. 'stext' | |
53 | * itself is 4 KB aligned, so padding out _edata to a 0x200 aligned | |
54 | * boundary should be sufficient. | |
55 | */ | |
56 | PECOFF_FILE_ALIGNMENT = 0x200; | |
57 | ||
58 | #ifdef CONFIG_EFI | |
59 | #define PECOFF_EDATA_PADDING \ | |
60 | .pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); } | |
61 | #else | |
62 | #define PECOFF_EDATA_PADDING | |
63 | #endif | |
64 | ||
cb083816 | 65 | #if defined(CONFIG_DEBUG_ALIGN_RODATA) |
97740051 AB |
66 | /* |
67 | * 4 KB granule: 1 level 2 entry | |
68 | * 16 KB granule: 128 level 3 entries, with contiguous bit | |
69 | * 64 KB granule: 32 level 3 entries, with contiguous bit | |
70 | */ | |
71 | #define SEGMENT_ALIGN SZ_2M | |
da141706 | 72 | #else |
97740051 AB |
73 | /* |
74 | * 4 KB granule: 16 level 3 entries, with contiguous bit | |
75 | * 16 KB granule: 4 level 3 entries, without contiguous bit | |
76 | * 64 KB granule: 1 level 3 entry | |
77 | */ | |
78 | #define SEGMENT_ALIGN SZ_64K | |
da141706 LA |
79 | #endif |
80 | ||
8c2c3df3 CM |
81 | SECTIONS |
82 | { | |
83 | /* | |
84 | * XXX: The linker does not define how output sections are | |
85 | * assigned to input sections when there are multiple statements | |
86 | * matching the same input section name. There is no documented | |
87 | * order of matching. | |
88 | */ | |
89 | /DISCARD/ : { | |
90 | ARM_EXIT_DISCARD(EXIT_TEXT) | |
91 | ARM_EXIT_DISCARD(EXIT_DATA) | |
92 | EXIT_CALL | |
93 | *(.discard) | |
94 | *(.discard.*) | |
1e48ef7f | 95 | *(.interp .dynamic) |
8c2c3df3 CM |
96 | } |
97 | ||
ab893fb9 | 98 | . = KIMAGE_VADDR + TEXT_OFFSET; |
8c2c3df3 CM |
99 | |
100 | .head.text : { | |
101 | _text = .; | |
102 | HEAD_TEXT | |
103 | } | |
104 | .text : { /* Real text segment */ | |
105 | _stext = .; /* Text and read-only data */ | |
8c2c3df3 CM |
106 | __exception_text_start = .; |
107 | *(.exception.text) | |
108 | __exception_text_end = .; | |
109 | IRQENTRY_TEXT | |
be7635e7 | 110 | SOFTIRQENTRY_TEXT |
8c2c3df3 CM |
111 | TEXT_TEXT |
112 | SCHED_TEXT | |
113 | LOCK_TEXT | |
2240bbb6 | 114 | HYPERVISOR_TEXT |
5dfe9d7d | 115 | IDMAP_TEXT |
8c2c3df3 CM |
116 | *(.fixup) |
117 | *(.gnu.warning) | |
118 | . = ALIGN(16); | |
119 | *(.got) /* Global offset table */ | |
120 | } | |
121 | ||
97740051 | 122 | . = ALIGN(SEGMENT_ALIGN); |
2f39b5f9 JL |
123 | RO_DATA(PAGE_SIZE) /* everything from this point to */ |
124 | EXCEPTION_TABLE(8) /* _etext will be marked RO NX */ | |
c80b7ee8 | 125 | NOTES |
8c2c3df3 | 126 | |
97740051 | 127 | . = ALIGN(SEGMENT_ALIGN); |
fca082bf | 128 | _etext = .; /* End of text and rodata section */ |
8c2c3df3 CM |
129 | __init_begin = .; |
130 | ||
131 | INIT_TEXT_SECTION(8) | |
132 | .exit.text : { | |
133 | ARM_EXIT_KEEP(EXIT_TEXT) | |
134 | } | |
da141706 | 135 | |
8c2c3df3 CM |
136 | .init.data : { |
137 | INIT_DATA | |
138 | INIT_SETUP(16) | |
139 | INIT_CALLS | |
140 | CON_INITCALL | |
141 | SECURITY_INITCALL | |
142 | INIT_RAM_FS | |
1ce99bf4 | 143 | *(.init.rodata.* .init.bss) /* from the EFI stub */ |
8c2c3df3 CM |
144 | } |
145 | .exit.data : { | |
146 | ARM_EXIT_KEEP(EXIT_DATA) | |
147 | } | |
148 | ||
98fb7548 | 149 | PERCPU_SECTION(L1_CACHE_BYTES) |
8c2c3df3 | 150 | |
e039ee4e AP |
151 | . = ALIGN(4); |
152 | .altinstructions : { | |
153 | __alt_instructions = .; | |
154 | *(.altinstructions) | |
155 | __alt_instructions_end = .; | |
156 | } | |
157 | .altinstr_replacement : { | |
158 | *(.altinstr_replacement) | |
159 | } | |
1e48ef7f | 160 | .rela : ALIGN(8) { |
1e48ef7f | 161 | *(.rela .rela*) |
1e48ef7f AB |
162 | } |
163 | .dynsym : ALIGN(8) { | |
1e48ef7f AB |
164 | *(.dynsym) |
165 | } | |
166 | .dynstr : { | |
167 | *(.dynstr) | |
168 | } | |
169 | .hash : { | |
170 | *(.hash) | |
171 | } | |
e039ee4e | 172 | |
0cd3defe AB |
173 | __rela_offset = ADDR(.rela) - KIMAGE_VADDR; |
174 | __rela_size = SIZEOF(.rela); | |
175 | __dynsym_offset = ADDR(.dynsym) - KIMAGE_VADDR; | |
176 | ||
97740051 | 177 | . = ALIGN(SEGMENT_ALIGN); |
9aa4ec15 MR |
178 | __init_end = .; |
179 | ||
3c620626 | 180 | _data = .; |
3c620626 | 181 | _sdata = .; |
98fb7548 | 182 | RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) |
a352ea3e | 183 | PECOFF_EDATA_PADDING |
3c620626 | 184 | _edata = .; |
8c2c3df3 | 185 | |
8c2c3df3 | 186 | BSS_SECTION(0, 0, 0) |
bd00cd5f MR |
187 | |
188 | . = ALIGN(PAGE_SIZE); | |
189 | idmap_pg_dir = .; | |
190 | . += IDMAP_DIR_SIZE; | |
191 | swapper_pg_dir = .; | |
192 | . += SWAPPER_DIR_SIZE; | |
193 | ||
8c2c3df3 CM |
194 | _end = .; |
195 | ||
196 | STABS_DEBUG | |
a2c1d73b MR |
197 | |
198 | HEAD_SYMBOLS | |
8c2c3df3 | 199 | } |
2240bbb6 MZ |
200 | |
201 | /* | |
5dfe9d7d | 202 | * The HYP init code and ID map text can't be longer than a page each, |
06f75a1f | 203 | * and should not cross a page boundary. |
2240bbb6 | 204 | */ |
06f75a1f AB |
205 | ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K, |
206 | "HYP init code too big or misaligned") | |
5dfe9d7d AB |
207 | ASSERT(__idmap_text_end - (__idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K, |
208 | "ID map text too big or misaligned") | |
da57a369 MR |
209 | |
210 | /* | |
211 | * If padding is applied before .head.text, virt<->phys conversions will fail. | |
212 | */ | |
ab893fb9 | 213 | ASSERT(_text == (KIMAGE_VADDR + TEXT_OFFSET), "HEAD is misaligned") |