1#ifdef CONFIG_PPC64 2#define PROVIDE32(x) PROVIDE(__unused__##x) 3#else 4#define PROVIDE32(x) PROVIDE(x) 5#endif 6#include <asm/page.h> 7#include <asm-generic/vmlinux.lds.h> 8#include <asm/cache.h> 9#include <asm/thread_info.h> 10 11ENTRY(_stext) 12 13PHDRS { 14 kernel PT_LOAD FLAGS(7); /* RWX */ 15 notes PT_NOTE FLAGS(0); 16 dummy PT_NOTE FLAGS(0); 17 18 /* binutils < 2.18 has a bug that makes it misbehave when taking an 19 ELF file with all segments at load address 0 as input. This 20 happens when running "strip" on vmlinux, because of the AT() magic 21 in this linker script. People using GCC >= 4.2 won't run into 22 this problem, because the "build-id" support will put some data 23 into the "notes" segment (at a non-zero load address). 24 25 To work around this, we force some data into both the "dummy" 26 segment and the kernel segment, so the dummy segment will get a 27 non-zero load address. It's not enough to always create the 28 "notes" segment, since if nothing gets assigned to it, its load 29 address will be zero. */ 30} 31 32#ifdef CONFIG_PPC64 33OUTPUT_ARCH(powerpc:common64) 34jiffies = jiffies_64; 35#else 36OUTPUT_ARCH(powerpc:common) 37jiffies = jiffies_64 + 4; 38#endif 39SECTIONS 40{ 41 . = KERNELBASE; 42 43/* 44 * Text, read only data and other permanent read-only sections 45 */ 46 47 _text = .; 48 _stext = .; 49 50 /* 51 * Head text. 52 * This needs to be in its own output section to avoid ld placing 53 * branch trampoline stubs randomly throughout the fixed sections, 54 * which it will do (even if the branch comes from another section) 55 * in order to optimize stub generation. 56 */ 57 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { 58#ifdef CONFIG_PPC64 59 KEEP(*(.head.text.first_256B)); 60#ifdef CONFIG_PPC_BOOK3E 61# define END_FIXED 0x100 62#else 63 KEEP(*(.head.text.real_vectors)); 64 *(.head.text.real_trampolines); 65 KEEP(*(.head.text.virt_vectors)); 66 *(.head.text.virt_trampolines); 67# if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) 68 KEEP(*(.head.data.fwnmi_page)); 69# define END_FIXED 0x8000 70# else 71# define END_FIXED 0x7000 72# endif 73#endif 74 ASSERT((. == END_FIXED), "vmlinux.lds.S: fixed section overflow error"); 75#else /* !CONFIG_PPC64 */ 76 HEAD_TEXT 77#endif 78 } :kernel 79 80 /* 81 * If the build dies here, it's likely code in head_64.S is referencing 82 * labels it can't reach, and the linker inserting stubs without the 83 * assembler's knowledge. To debug, remove the above assert and 84 * rebuild. Look for branch stubs in the fixed section region. 85 * 86 * Linker stub generation could be allowed in "trampoline" 87 * sections if absolutely necessary, but this would require 88 * some rework of the fixed sections. Before resorting to this, 89 * consider references that have sufficient addressing range, 90 * (e.g., hand coded trampolines) so the linker does not have 91 * to add stubs. 92 * 93 * Linker stubs at the top of the main text section are currently not 94 * detected, and will result in a crash at boot due to offsets being 95 * wrong. 96 */ 97 .text : AT(ADDR(.text) - LOAD_OFFSET) { 98 ALIGN_FUNCTION(); 99 /* careful! __ftr_alt_* sections need to be close to .text */ 100 *(.text .fixup __ftr_alt_* .ref.text) 101 SCHED_TEXT 102 CPUIDLE_TEXT 103 LOCK_TEXT 104 KPROBES_TEXT 105 IRQENTRY_TEXT 106 SOFTIRQENTRY_TEXT 107 MEM_KEEP(init.text) 108 MEM_KEEP(exit.text) 109 110#ifdef CONFIG_PPC32 111 *(.got1) 112 __got2_start = .; 113 *(.got2) 114 __got2_end = .; 115#endif /* CONFIG_PPC32 */ 116 117 } :kernel 118 119 . = ALIGN(PAGE_SIZE); 120 _etext = .; 121 PROVIDE32 (etext = .); 122 123 /* Read-only data */ 124 RODATA 125 126 EXCEPTION_TABLE(0) 127 128 NOTES :kernel :notes 129 130 /* The dummy segment contents for the bug workaround mentioned above 131 near PHDRS. */ 132 .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) { 133 LONG(0) 134 LONG(0) 135 LONG(0) 136 } :kernel :dummy 137 138/* 139 * Init sections discarded at runtime 140 */ 141 . = ALIGN(PAGE_SIZE); 142 __init_begin = .; 143 INIT_TEXT_SECTION(PAGE_SIZE) :kernel 144 145 /* .exit.text is discarded at runtime, not link time, 146 * to deal with references from __bug_table 147 */ 148 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { 149 EXIT_TEXT 150 } 151 152 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { 153 INIT_DATA 154 __vtop_table_begin = .; 155 *(.vtop_fixup); 156 __vtop_table_end = .; 157 __ptov_table_begin = .; 158 *(.ptov_fixup); 159 __ptov_table_end = .; 160 } 161 162 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { 163 INIT_SETUP(16) 164 } 165 166 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) { 167 INIT_CALLS 168 } 169 170 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) { 171 CON_INITCALL 172 } 173 174 SECURITY_INIT 175 176 . = ALIGN(8); 177 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) { 178 __start___ftr_fixup = .; 179 *(__ftr_fixup) 180 __stop___ftr_fixup = .; 181 } 182 . = ALIGN(8); 183 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) { 184 __start___mmu_ftr_fixup = .; 185 *(__mmu_ftr_fixup) 186 __stop___mmu_ftr_fixup = .; 187 } 188 . = ALIGN(8); 189 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) { 190 __start___lwsync_fixup = .; 191 *(__lwsync_fixup) 192 __stop___lwsync_fixup = .; 193 } 194#ifdef CONFIG_PPC64 195 . = ALIGN(8); 196 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) { 197 __start___fw_ftr_fixup = .; 198 *(__fw_ftr_fixup) 199 __stop___fw_ftr_fixup = .; 200 } 201#endif 202 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { 203 INIT_RAM_FS 204 } 205 206 PERCPU_SECTION(L1_CACHE_BYTES) 207 208 . = ALIGN(8); 209 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) { 210 __machine_desc_start = . ; 211 *(.machine.desc) 212 __machine_desc_end = . ; 213 } 214#ifdef CONFIG_RELOCATABLE 215 . = ALIGN(8); 216 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET) 217 { 218#ifdef CONFIG_PPC32 219 __dynamic_symtab = .; 220#endif 221 *(.dynsym) 222 } 223 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) } 224 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET) 225 { 226 __dynamic_start = .; 227 *(.dynamic) 228 } 229 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) } 230 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) } 231 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET) 232 { 233 __rela_dyn_start = .; 234 *(.rela*) 235 } 236#endif 237 /* .exit.data is discarded at runtime, not link time, 238 * to deal with references from .exit.text 239 */ 240 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { 241 EXIT_DATA 242 } 243 244 /* freed after init ends here */ 245 . = ALIGN(PAGE_SIZE); 246 __init_end = .; 247 248/* 249 * And now the various read/write data 250 */ 251 252 . = ALIGN(PAGE_SIZE); 253 _sdata = .; 254 255#ifdef CONFIG_PPC32 256 .data : AT(ADDR(.data) - LOAD_OFFSET) { 257 DATA_DATA 258 *(.sdata) 259 *(.got.plt) *(.got) 260 } 261#else 262 .data : AT(ADDR(.data) - LOAD_OFFSET) { 263 DATA_DATA 264 *(.data.rel*) 265 *(.toc1) 266 *(.branch_lt) 267 } 268 269 .opd : AT(ADDR(.opd) - LOAD_OFFSET) { 270 *(.opd) 271 } 272 273 . = ALIGN(256); 274 .got : AT(ADDR(.got) - LOAD_OFFSET) { 275 __toc_start = .; 276#ifndef CONFIG_RELOCATABLE 277 __prom_init_toc_start = .; 278 arch/powerpc/kernel/prom_init.o*(.toc .got) 279 __prom_init_toc_end = .; 280#endif 281 *(.got) 282 *(.toc) 283 } 284#endif 285 286 /* The initial task and kernel stack */ 287 INIT_TASK_DATA_SECTION(THREAD_SIZE) 288 289 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) { 290 PAGE_ALIGNED_DATA(PAGE_SIZE) 291 } 292 293 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) { 294 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES) 295 } 296 297 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) { 298 READ_MOSTLY_DATA(L1_CACHE_BYTES) 299 } 300 301 . = ALIGN(PAGE_SIZE); 302 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { 303 NOSAVE_DATA 304 } 305 306 . = ALIGN(PAGE_SIZE); 307 _edata = .; 308 PROVIDE32 (edata = .); 309 310/* 311 * And finally the bss 312 */ 313 314 BSS_SECTION(0, 0, 0) 315 316 . = ALIGN(PAGE_SIZE); 317 _end = . ; 318 PROVIDE32 (end = .); 319 320 /* Sections to be discarded. */ 321 DISCARDS 322} 323