1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Kernel link layout for various "sections !! 2 #include <asm/asm-offsets.h>
3 * !! 3 #include <asm/thread_info.h>
4 * Copyright (C) 1999-2003 Matthew Wilcox < !! 4
5 * Copyright (C) 2000-2003 Paul Bame <bame !! 5 #define PAGE_SIZE _PAGE_SIZE
6 * Copyright (C) 2000 John Marvin <jsm at p <<
7 * Copyright (C) 2000 Michael Ang <mang wit <<
8 * Copyright (C) 2002 Randolph Chung <tausq <<
9 * Copyright (C) 2003 James Bottomley <jejb <<
10 * Copyright (C) 2006-2013 Helge Deller <del <<
11 */ <<
12 6
13 /* 7 /*
14 * Put page table entries (swapper_pg_dir) as !! 8 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
15 * will ensure that it has .bss alignment (PAG !! 9 * ensure that it has .bss alignment (64K).
16 */ 10 */
17 #define BSS_FIRST_SECTIONS *(.data..vm0.p !! 11 #define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
18 *(.data..vm0.p <<
19 *(.data..vm0.p <<
20 12
21 #define CC_USING_PATCHABLE_FUNCTION_ENTRY !! 13 /* Cavium Octeon should not have a separate PT_NOTE Program Header. */
22 #define RO_EXCEPTION_TABLE_ALIGN 8 !! 14 #ifndef CONFIG_CAVIUM_OCTEON_SOC
>> 15 #define EMITS_PT_NOTE
>> 16 #endif
23 17
24 #include <asm-generic/vmlinux.lds.h> !! 18 #define RUNTIME_DISCARD_EXIT
25 19
26 /* needed for the processor specific cache ali !! 20 #include <asm-generic/vmlinux.lds.h>
27 #include <asm/cache.h> <<
28 #include <asm/page.h> <<
29 #include <asm/asm-offsets.h> <<
30 #include <asm/thread_info.h> <<
31 <<
32 /* ld script to make hppa Linux kernel */ <<
33 #ifndef CONFIG_64BIT <<
34 OUTPUT_FORMAT("elf32-hppa-linux") <<
35 OUTPUT_ARCH(hppa) <<
36 #else <<
37 OUTPUT_FORMAT("elf64-hppa-linux") <<
38 OUTPUT_ARCH(hppa:hppa2.0w) <<
39 #endif <<
40 21
41 #define EXIT_TEXT_SECTIONS() .exit.text : { !! 22 #undef mips
42 #if !defined(CONFIG_64BIT) || defined(CONFIG_M !! 23 #define mips mips
43 #define MLONGCALL_KEEP(x) !! 24 OUTPUT_ARCH(mips)
44 #define MLONGCALL_DISCARD(x) x !! 25 ENTRY(kernel_entry)
>> 26 PHDRS {
>> 27 text PT_LOAD FLAGS(7); /* RWX */
>> 28 #ifndef CONFIG_CAVIUM_OCTEON_SOC
>> 29 note PT_NOTE FLAGS(4); /* R__ */
>> 30 #endif /* CAVIUM_OCTEON_SOC */
>> 31 }
>> 32
>> 33 #ifdef CONFIG_32BIT
>> 34 #ifdef CONFIG_CPU_LITTLE_ENDIAN
>> 35 jiffies = jiffies_64;
>> 36 #else
>> 37 jiffies = jiffies_64 + 4;
>> 38 #endif
45 #else 39 #else
46 #define MLONGCALL_KEEP(x) x !! 40 jiffies = jiffies_64;
47 #define MLONGCALL_DISCARD(x) <<
48 #endif 41 #endif
49 42
50 ENTRY(parisc_kernel_start) <<
51 #ifndef CONFIG_64BIT <<
52 jiffies = jiffies_64 + 4; <<
53 #else <<
54 jiffies = jiffies_64; <<
55 #endif <<
56 SECTIONS 43 SECTIONS
57 { 44 {
58 . = KERNEL_BINARY_TEXT_START; !! 45 #ifdef CONFIG_BOOT_ELF64
59 !! 46 /* Read-only sections, merged into text segment: */
60 __init_begin = .; !! 47 /* . = 0xc000000000000000; */
61 HEAD_TEXT_SECTION !! 48
62 MLONGCALL_DISCARD(INIT_TEXT_SECTION(8) !! 49 /* This is the value for an Origin kernel, taken from an IRIX kernel. */
63 !! 50 /* . = 0xc00000000001c000; */
64 . = ALIGN(PAGE_SIZE); !! 51
65 INIT_DATA_SECTION(PAGE_SIZE) !! 52 /* Set the vaddr for the text segment to a value
66 MLONGCALL_DISCARD(EXIT_TEXT_SECTIONS() !! 53 * >= 0xa800 0000 0001 9000 if no symmon is going to configured
67 .exit.data : !! 54 * >= 0xa800 0000 0030 0000 otherwise
68 { !! 55 */
69 EXIT_DATA <<
70 } <<
71 PERCPU_SECTION(8) <<
72 . = ALIGN(4); <<
73 .altinstructions : { <<
74 __alt_instructions = .; <<
75 *(.altinstructions) <<
76 __alt_instructions_end = .; <<
77 } <<
78 . = ALIGN(HUGEPAGE_SIZE); <<
79 __init_end = .; <<
80 /* freed after init ends here */ <<
81 56
82 _text = .; /* Text and re !! 57 /* . = 0xa800000000300000; */
83 _stext = .; !! 58 . = 0xffffffff80300000;
84 MLONGCALL_KEEP(INIT_TEXT_SECTION(8)) !! 59 #endif
85 .text ALIGN(PAGE_SIZE) : { !! 60 . = LINKER_LOAD_ADDRESS;
>> 61 /* read-only */
>> 62 _text = .; /* Text and read-only data */
>> 63 .text : {
86 TEXT_TEXT 64 TEXT_TEXT
87 LOCK_TEXT <<
88 SCHED_TEXT 65 SCHED_TEXT
>> 66 LOCK_TEXT
89 KPROBES_TEXT 67 KPROBES_TEXT
90 IRQENTRY_TEXT 68 IRQENTRY_TEXT
91 SOFTIRQENTRY_TEXT 69 SOFTIRQENTRY_TEXT
92 *(.text.do_softirq) <<
93 *(.text.sys_exit) <<
94 *(.text.do_sigaltstack) <<
95 *(.text.do_fork) <<
96 *(.text.div) <<
97 *($$*) /* mil <<
98 *(.text.*) <<
99 *(.fixup) 70 *(.fixup)
100 *(.lock.text) /* out <<
101 *(.gnu.warning) 71 *(.gnu.warning)
>> 72 . = ALIGN(16);
>> 73 *(.got) /* Global offset table */
>> 74 } :text = 0
>> 75 _etext = .; /* End of text section */
>> 76
>> 77 EXCEPTION_TABLE(16)
>> 78
>> 79 /* Exception table for data bus errors */
>> 80 __dbe_table : {
>> 81 __start___dbe_table = .;
>> 82 KEEP(*(__dbe_table))
>> 83 __stop___dbe_table = .;
102 } 84 }
103 MLONGCALL_KEEP(EXIT_TEXT_SECTIONS()) !! 85
104 . = ALIGN(PAGE_SIZE); !! 86 _sdata = .; /* Start of data section */
105 _etext = .; !! 87 RO_DATA(4096)
106 /* End of text section */ !! 88
107 !! 89 /* writeable */
108 /* Start of data section */ !! 90 .data : { /* Data */
109 _sdata = .; !! 91 . = . + DATAOFFSET; /* for CONFIG_MAPPED_KERNEL */
110 !! 92
111 /* Architecturally we need to keep __g !! 93 INIT_TASK_DATA(THREAD_SIZE)
112 * in front of RO_DATA() which stores !! 94 NOSAVE_DATA
113 * and ftrace symbols. */ !! 95 PAGE_ALIGNED_DATA(PAGE_SIZE)
114 #ifdef CONFIG_64BIT !! 96 CACHELINE_ALIGNED_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
115 . = ALIGN(16); !! 97 READ_MOSTLY_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
116 /* Linkage tables */ !! 98 DATA_DATA
117 .opd : { !! 99 CONSTRUCTORS
118 __start_opd = .; !! 100 }
119 *(.opd) !! 101 BUG_TABLE
120 __end_opd = .; !! 102 _gp = . + 0x8000;
121 } PROVIDE (__gp = .); !! 103 .lit8 : {
122 .plt : { !! 104 *(.lit8)
123 *(.plt) !! 105 }
124 } !! 106 .lit4 : {
125 .dlt : { !! 107 *(.lit4)
126 *(.dlt) !! 108 }
>> 109 /* We want the small data sections together, so single-instruction offsets
>> 110 can access them all, and initialized data all before uninitialized, so
>> 111 we can shorten the on-disk segment size. */
>> 112 .sdata : {
>> 113 *(.sdata)
127 } 114 }
128 #endif !! 115 _edata = .; /* End of data section */
129 116
130 RO_DATA(PAGE_SIZE) !! 117 /* will be freed after init */
>> 118 . = ALIGN(PAGE_SIZE); /* Init code and data */
>> 119 __init_begin = .;
>> 120 INIT_TEXT_SECTION(PAGE_SIZE)
>> 121 INIT_DATA_SECTION(16)
131 122
132 /* unwind info */ <<
133 . = ALIGN(4); 123 . = ALIGN(4);
134 .PARISC.unwind : { !! 124 .mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) {
135 __start___unwind = .; !! 125 __mips_machines_start = .;
136 *(.PARISC.unwind) !! 126 KEEP(*(.mips.machines.init))
137 __stop___unwind = .; !! 127 __mips_machines_end = .;
138 } 128 }
139 129
140 /* writeable */ !! 130 /* .exit.text is discarded at runtime, not link time, to deal with
141 /* Make sure this is page aligned so !! 131 * references from .rodata
142 * that we can properly leave these <<
143 * as writable <<
144 */ 132 */
145 . = ALIGN(HUGEPAGE_SIZE); !! 133 .exit.text : {
146 data_start = .; !! 134 EXIT_TEXT
>> 135 }
>> 136 .exit.data : {
>> 137 EXIT_DATA
>> 138 }
>> 139 #ifdef CONFIG_SMP
>> 140 PERCPU_SECTION(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
>> 141 #endif
147 142
148 /* Data */ !! 143 .rel.dyn : ALIGN(8) {
149 RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, PAG !! 144 *(.rel)
>> 145 *(.rel*)
>> 146 }
150 147
151 /* PA-RISC locks requires 16-byte alig !! 148 #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
152 . = ALIGN(16); !! 149 STRUCT_ALIGN();
153 .data..lock_aligned : { !! 150 .appended_dtb : AT(ADDR(.appended_dtb) - LOAD_OFFSET) {
154 *(.data..lock_aligned) !! 151 *(.appended_dtb)
>> 152 KEEP(*(.appended_dtb))
155 } 153 }
>> 154 #endif
156 155
157 /* End of data section */ !! 156 #ifdef CONFIG_RELOCATABLE
158 . = ALIGN(PAGE_SIZE); !! 157 . = ALIGN(4);
159 _edata = .; <<
160 158
161 /* BSS */ !! 159 .data.reloc : {
162 BSS_SECTION(PAGE_SIZE, PAGE_SIZE, PAGE !! 160 _relocation_start = .;
>> 161 /*
>> 162 * Space for relocation table
>> 163 * This needs to be filled so that the
>> 164 * relocs tool can overwrite the content.
>> 165 * An invalid value is left at the start of the
>> 166 * section to abort relocation if the table
>> 167 * has not been filled in.
>> 168 */
>> 169 LONG(0xFFFFFFFF);
>> 170 FILL(0);
>> 171 . += CONFIG_RELOCATION_TABLE_SIZE - 4;
>> 172 _relocation_end = .;
>> 173 }
>> 174 #endif
>> 175
>> 176 #ifdef CONFIG_MIPS_RAW_APPENDED_DTB
>> 177 .fill : {
>> 178 FILL(0);
>> 179 BYTE(0);
>> 180 STRUCT_ALIGN();
>> 181 }
>> 182 __appended_dtb = .;
>> 183 /* leave space for appended DTB */
>> 184 . += 0x100000;
>> 185 #endif
>> 186 /*
>> 187 * Align to 64K in attempt to eliminate holes before the
>> 188 * .bss..swapper_pg_dir section at the start of .bss. This
>> 189 * also satisfies PAGE_SIZE alignment as the largest page size
>> 190 * allowed is 64K.
>> 191 */
>> 192 . = ALIGN(0x10000);
>> 193 __init_end = .;
>> 194 /* freed after init ends here */
>> 195
>> 196 /*
>> 197 * Force .bss to 64K alignment so that .bss..swapper_pg_dir
>> 198 * gets that alignment. .sbss should be empty, so there will be
>> 199 * no holes after __init_end. */
>> 200 BSS_SECTION(0, 0x10000, 8)
163 201
164 . = ALIGN(HUGEPAGE_SIZE); <<
165 _end = . ; 202 _end = . ;
166 203
>> 204 /* These mark the ABI of the kernel for debuggers. */
>> 205 .mdebug.abi32 : {
>> 206 KEEP(*(.mdebug.abi32))
>> 207 }
>> 208 .mdebug.abi64 : {
>> 209 KEEP(*(.mdebug.abi64))
>> 210 }
>> 211
>> 212 /* This is the MIPS specific mdebug section. */
>> 213 .mdebug : {
>> 214 *(.mdebug)
>> 215 }
>> 216
167 STABS_DEBUG 217 STABS_DEBUG
>> 218 DWARF_DEBUG
168 ELF_DETAILS 219 ELF_DETAILS
169 .note 0 : { *(.note) } !! 220
>> 221 /* These must appear regardless of . */
>> 222 .gptab.sdata : {
>> 223 *(.gptab.data)
>> 224 *(.gptab.sdata)
>> 225 }
>> 226 .gptab.sbss : {
>> 227 *(.gptab.bss)
>> 228 *(.gptab.sbss)
>> 229 }
170 230
171 /* Sections to be discarded */ 231 /* Sections to be discarded */
172 DISCARDS 232 DISCARDS
173 /DISCARD/ : { 233 /DISCARD/ : {
174 #ifdef CONFIG_64BIT !! 234 /* ABI crap starts here */
175 /* temporary hack until binuti !! 235 *(.MIPS.abiflags)
176 * for static binaries !! 236 *(.MIPS.options)
177 */ !! 237 *(.gnu.attributes)
178 *(.interp) !! 238 *(.options)
179 *(.dynsym) !! 239 *(.pdr)
180 *(.dynstr) !! 240 *(.reginfo)
181 *(.dynamic) <<
182 *(.hash) <<
183 *(.gnu.hash) <<
184 #endif <<
185 } 241 }
186 } 242 }
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