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 and gots */ 48 .text : AT(ADDR(.text) - LOAD_OFFSET) { 49 ALIGN_FUNCTION(); 50 HEAD_TEXT 51 _text = .; 52 /* careful! __ftr_alt_* sections need to be close to .text */ 53 *(.text .fixup __ftr_alt_* .ref.text) 54 SCHED_TEXT 55 LOCK_TEXT 56 KPROBES_TEXT 57 IRQENTRY_TEXT 58 59#ifdef CONFIG_PPC32 60 *(.got1) 61 __got2_start = .; 62 *(.got2) 63 __got2_end = .; 64#endif /* CONFIG_PPC32 */ 65 66 } :kernel 67 68 . = ALIGN(PAGE_SIZE); 69 _etext = .; 70 PROVIDE32 (etext = .); 71 72 /* Read-only data */ 73 RODATA 74 75 EXCEPTION_TABLE(0) 76 77 NOTES :kernel :notes 78 79 /* The dummy segment contents for the bug workaround mentioned above 80 near PHDRS. */ 81 .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) { 82 LONG(0) 83 LONG(0) 84 LONG(0) 85 } :kernel :dummy 86 87/* 88 * Init sections discarded at runtime 89 */ 90 . = ALIGN(PAGE_SIZE); 91 __init_begin = .; 92 INIT_TEXT_SECTION(PAGE_SIZE) :kernel 93 94 /* .exit.text is discarded at runtime, not link time, 95 * to deal with references from __bug_table 96 */ 97 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { 98 EXIT_TEXT 99 } 100 101 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { 102 INIT_DATA 103 __vtop_table_begin = .; 104 *(.vtop_fixup); 105 __vtop_table_end = .; 106 __ptov_table_begin = .; 107 *(.ptov_fixup); 108 __ptov_table_end = .; 109 } 110 111 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { 112 INIT_SETUP(16) 113 } 114 115 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) { 116 INIT_CALLS 117 } 118 119 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) { 120 CON_INITCALL 121 } 122 123 SECURITY_INIT 124 125 . = ALIGN(8); 126 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) { 127 __start___ftr_fixup = .; 128 *(__ftr_fixup) 129 __stop___ftr_fixup = .; 130 } 131 . = ALIGN(8); 132 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) { 133 __start___mmu_ftr_fixup = .; 134 *(__mmu_ftr_fixup) 135 __stop___mmu_ftr_fixup = .; 136 } 137 . = ALIGN(8); 138 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) { 139 __start___lwsync_fixup = .; 140 *(__lwsync_fixup) 141 __stop___lwsync_fixup = .; 142 } 143#ifdef CONFIG_PPC64 144 . = ALIGN(8); 145 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) { 146 __start___fw_ftr_fixup = .; 147 *(__fw_ftr_fixup) 148 __stop___fw_ftr_fixup = .; 149 } 150#endif 151 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { 152 INIT_RAM_FS 153 } 154 155 PERCPU_SECTION(L1_CACHE_BYTES) 156 157 . = ALIGN(8); 158 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) { 159 __machine_desc_start = . ; 160 *(.machine.desc) 161 __machine_desc_end = . ; 162 } 163#ifdef CONFIG_RELOCATABLE 164 . = ALIGN(8); 165 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET) 166 { 167#ifdef CONFIG_RELOCATABLE_PPC32 168 __dynamic_symtab = .; 169#endif 170 *(.dynsym) 171 } 172 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) } 173 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET) 174 { 175 __dynamic_start = .; 176 *(.dynamic) 177 } 178 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) } 179 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) } 180 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET) 181 { 182 __rela_dyn_start = .; 183 *(.rela*) 184 } 185#endif 186 187 /* freed after init ends here */ 188 . = ALIGN(PAGE_SIZE); 189 __init_end = .; 190 191/* 192 * And now the various read/write data 193 */ 194 195 . = ALIGN(PAGE_SIZE); 196 _sdata = .; 197 198#ifdef CONFIG_PPC32 199 .data : AT(ADDR(.data) - LOAD_OFFSET) { 200 DATA_DATA 201 *(.sdata) 202 *(.got.plt) *(.got) 203 } 204#else 205 .data : AT(ADDR(.data) - LOAD_OFFSET) { 206 DATA_DATA 207 *(.data.rel*) 208 *(.toc1) 209 *(.branch_lt) 210 } 211 212 .opd : AT(ADDR(.opd) - LOAD_OFFSET) { 213 *(.opd) 214 } 215 216 . = ALIGN(256); 217 .got : AT(ADDR(.got) - LOAD_OFFSET) { 218 __toc_start = .; 219#ifndef CONFIG_RELOCATABLE 220 __prom_init_toc_start = .; 221 arch/powerpc/kernel/prom_init.o*(.toc .got) 222 __prom_init_toc_end = .; 223#endif 224 *(.got) 225 *(.toc) 226 } 227#endif 228 229 /* The initial task and kernel stack */ 230 INIT_TASK_DATA_SECTION(THREAD_SIZE) 231 232 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) { 233 PAGE_ALIGNED_DATA(PAGE_SIZE) 234 } 235 236 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) { 237 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES) 238 } 239 240 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) { 241 READ_MOSTLY_DATA(L1_CACHE_BYTES) 242 } 243 244 . = ALIGN(PAGE_SIZE); 245 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { 246 NOSAVE_DATA 247 } 248 249 . = ALIGN(PAGE_SIZE); 250 _edata = .; 251 PROVIDE32 (edata = .); 252 253/* 254 * And finally the bss 255 */ 256 257 BSS_SECTION(0, 0, 0) 258 259 . = ALIGN(PAGE_SIZE); 260 _end = . ; 261 PROVIDE32 (end = .); 262 263 /* Sections to be discarded. */ 264 DISCARDS 265} 266